<PAGE>
 
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON OCTOBER 31, 1995
                                                      REGISTRATION NO. 33-
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                               ----------------
 
                                   FORM S-3
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
 
                               ----------------
 
                            ALPHA INDUSTRIES, INC.
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
               DELAWARE                              04-2302115
    (STATE OR OTHER JURISDICTION OF               (I.R.S. EMPLOYER
    INCORPORATION OR ORGANIZATION)                  I.D. NUMBER)
 
                               ----------------
 
          20 SYLVAN ROAD, WOBURN, MASSACHUSETTS 01801 (617) 935-5150
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                               ----------------
 
                           MARTIN J. REID, PRESIDENT
                            ALPHA INDUSTRIES, INC.
                  20 SYLVAN ROAD, WOBURN, MASSACHUSETTS 01801
                                (617) 935-5150
(NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                             OF AGENT FOR SERVICE)
 
                               ----------------
 
                       COPIES OF ALL COMMUNICATIONS TO:
 
       STEVEN R. LONDON, ESQUIRE             ADAM SONNENSCHEIN, ESQUIRE
    BROWN, RUDNICK, FREED & GESMER               FOLEY, HOAG & ELIOT
         ONE FINANCIAL CENTER                  ONE POST OFFICE SQUARE
      BOSTON, MASSACHUSETTS 02111            BOSTON, MASSACHUSETTS 02109
            (617) 330-9000                         (617) 832-1000
 
                               ----------------
 
   APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon
      as practicable after this Registration Statement becomes effective.
 
                               ----------------
 
  If the only securities being registered on this form are being offered
pursuant to dividend or interest reinvestment plans, please check the
following box. [_]
 
  If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, please check the following box. [_]
 
  If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following
box and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [_]
 
  If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]
 
  If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [X]
 
                               ----------------

<TABLE> 
<CAPTION> 
 
                        CALCULATION OF REGISTRATION FEE
- ----------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------
                                                PROPOSED        PROPOSED
                                 AMOUNT         MAXIMUM          MAXIMUM
  TITLE OF EACH CLASS OF         TO BE       OFFERING PRICE     AGGREGATE        AMOUNT OF
SECURITIES TO BE REGISTERED    REGISTERED     PER SHARE(1)  OFFERING PRICE(1) REGISTRATION FEE
- ----------------------------------------------------------------------------------------------
<S>                          <C>             <C>            <C>               <C>
Common Stock, $.25 par
 value.................        2,300,000(2)      $15.50        $35,650,000        $12,294
- ----------------------------------------------------------------------------------------------
Rights to Purchase
 Common Stock(3).......        2,300,000(2)        $0              $0                $0
- ----------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------
</TABLE>
 
(1) Estimated solely for the purpose of determining the registration fee
    pursuant to Rule 457(c) under the Securities Act of 1933, and based upon
    the average of the reported high and low prices of the Common Stock on the
    American Stock Exchange on October 25, 1995.
(2) Includes up to 300,000 shares of Common Stock which may be purchased by
    the Underwriters to cover over-allotments, if any.
(3) Pursuant to a Rights Agreement entered into in 1986, as amended, one right
    (each a "Right") is deemed to be delivered with each share of Common Stock
    issued by the Company. The Rights currently are not separately
    transferable apart from the Common Stock, nor are they exercisable until
    the occurrence of certain events. Accordingly, no independent value has
    been attributed to the Rights.
 
  THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS
REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH
SECTION 8(A) OF THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT
SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID
SECTION 8(A), MAY DETERMINE.
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------

<PAGE>
 
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A         +
+REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE   +
+SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY  +
+OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT        +
+BECOMES EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR   +
+THE SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE      +
+SECURITIES IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE    +
+UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF  +
+ANY SUCH STATE.                                                               +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                 SUBJECT TO COMPLETION, DATED OCTOBER 31, 1995
 
                                2,000,000 SHARES
 
 
                         [LOGO OF ALPHA APPEARS HERE]

 
                                  COMMON STOCK
 
  All of the shares of Common Stock offered hereby are being sold by Alpha
Industries, Inc. (the "Company"). The Company's Common Stock is traded on the
American Stock Exchange under the symbol AHA. On October 30, 1995, the last
reported sale price of the Common Stock as reported on the American Stock
Exchange was $15.50 per share. See "Price Range of Common Stock."
 
  Pursuant to a Rights Agreement entered into in 1986, as amended, one right
(each a "Right") is deemed to be delivered with each share of Common Stock
offered and sold hereby. The Rights currently are not separately transferable
apart from the Common Stock, nor are they exercisable until the occurrence of
certain events. See "Description of Capital Stock and Other Matters--Rights
Distribution."
 
  SEE "RISK FACTORS" COMMENCING ON PAGE 7 FOR A DISCUSSION OF CERTAIN FACTORS
THAT SHOULD BE CONSIDERED BY PROSPECTIVE PURCHASERS OF THE COMMON STOCK OFFERED
HEREBY.
 
                                  -----------
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                               Price to Underwriting Proceeds to
                                                Public  Discount(1)  Company(2)
- --------------------------------------------------------------------------------
<S>                                            <C>      <C>          <C>
Per Share....................................    $          $            $
Total(3).....................................   $          $            $
</TABLE>

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
(1) See "Underwriting" for information concerning indemnification of the
    Underwriters and other matters.
(2) Before deducting expenses payable by the Company estimated at $450,000.
(3) The Company has granted the Underwriters a 30-day option to purchase up to
    300,000 additional shares of Common Stock solely to cover over-allotments,
    if any. If the Underwriters exercise this option in full, the Price to
    Public will total $   , the Underwriting Discount will total $    and the
    Proceeds to Company will total $   . See "Underwriting."
 
  The shares of Common Stock are offered by the Underwriters named herein,
subject to receipt and acceptance by them and subject to their right to reject
any order in whole or in part. It is expected that delivery of the certificates
representing such shares will be made against payment therefor at the office of
Montgomery Securities on or about     , 1995.
 
                                  -----------
 
Montgomery Securities
 
                         Oppenheimer & Co., Inc.
 
                                                    Adams, Harkness & Hill, Inc.
 
                                        , 1995

<PAGE>
                        DESCRIPTION OF GRAPHIC MATERIAL

There are three sets of photographs:
 
1. One photograph running the length of the left side of the page shows a number
of the Company's products.

2. A group of three photographs illustrates the use of cellular telephones and 
the radio link for the cellular wireless infrastructure.

3. The last set of photographs depicts a variety of wireless communications 
devises, including a cellular telephone, pager, wireless fax, direct broadcast 
satellite, wireless cable TV and global positioning system receiver. There are 
also three diagrams showing satellites and a radio link for some of these 
applications.
 
 
 
                               ----------------
 
  IN CONNECTION WITH THIS OFFERING, THE UNDERWRITERS MAY OVER-ALLOT OR EFFECT
TRANSACTIONS WHICH STABILIZE OR MAINTAIN THE MARKET PRICE OF THE COMMON STOCK
AT A LEVEL ABOVE THAT WHICH MIGHT OTHERWISE PREVAIL IN THE OPEN MARKET. SUCH
TRANSACTIONS MAY BE EFFECTED ON THE AMERICAN STOCK EXCHANGE OR OTHERWISE. SUCH
STABILIZING, IF COMMENCED, MAY BE DISCONTINUED AT ANY TIME.

<PAGE>
 
                             AVAILABLE INFORMATION
 
  The Company is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and in accordance
therewith files reports, proxy statements and other information with the
Securities and Exchange Commission (the "Commission"). Such reports, proxy
statements and other information filed by the Company can be inspected and
copied at the public reference facilities maintained by the Commission at 450
Fifth Street, N.W., Room 1024, Judiciary Plaza, Washington, D.C. 20549, and at
the Commission's Regional Offices at 500 West Madison Street, Suite 1400,
Chicago, Illinois 60661 and 7 World Trade Center, Suite 1300, New York, New
York 10048. Copies of such material can be obtained from the Public Reference
Section of the Commission at 450 Fifth Street, NW, Room 1024, Judiciary Plaza,
Washington, D.C. 20549, at prescribed rates. The Company's Common Stock is
listed on the American Stock Exchange. Reports, proxy statements and other
information concerning the Company can also be inspected at the offices of the
American Stock Exchange, 20 Broad Street, New York, New York 10005.
 
  Additional information regarding the Company and the shares offered hereby
is contained in the Registration Statement on Form S-3 and the exhibits
thereto filed with the Commission under the Securities Act of 1933, as amended
(the "Securities Act"). For further information pertaining to the Company and
the shares, reference is made to the Registration Statement and the exhibits
thereto, which may be inspected without charge at, and copies thereof may be
obtained at prescribed rates from, the office of the Commission at 450 Fifth
Street, N.W., Washington, D.C. 20549.
 
                               ----------------
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
  The following documents heretofore filed by the Company with the Commission
(File No. 1-5560) pursuant to the Exchange Act are incorporated herein by
reference: (1) the Company's Annual Report on Form 10-K for the fiscal year
ended April 2, 1995; (2) the Company's Quarterly Report on Form 10-Q for the
quarter ended July 2, 1995; (3) the Company's Quarterly Report on Form 10-Q
for the quarter ended October 1, 1995; and (4) the Company's Definitive Proxy
Statement dated August 2, 1995 used in connection with the Annual Meeting of
Stockholders held September 11, 1995.
 
  All reports and other documents subsequently filed by the Company pursuant
to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of
this Prospectus and prior to the termination of the offering of the Common
Stock hereunder shall be deemed to be incorporated by reference herein and to
be a part hereof from the date of the filing of such reports and documents.
The Company hereby undertakes to provide without charge to each person,
including any beneficial owner, to whom a copy of this Prospectus is
delivered, upon written or oral request of such person, a copy of any or all
of the foregoing documents incorporated herein by reference (exclusive of
exhibits, unless such exhibits are specifically incorporated by reference into
such documents). Requests for such documents should be submitted in writing to
the Corporate Secretary at the corporate headquarters of the Company at 20
Sylvan Road, Woburn, MA 01801 or by telephone at (617) 935-5150.
 
  Any statement contained in a document incorporated or deemed to be
incorporated by reference herein shall be deemed to be modified or superseded
for purposes of this Prospectus to the extent that a statement contained
herein, or in any other subsequently filed document that also is (or is deemed
to be) incorporated by reference herein, modifies or supersedes such
statement. Any statement so modified or superseded shall not be deemed, except
as so modified or superseded, to constitute a part of the Registration
Statement or this Prospectus.
 
                                       3

<PAGE>
 
                               PROSPECTUS SUMMARY
 
  The following summary should be read in conjunction with, and is qualified in
its entirety by, the more detailed information, including "Risk Factors,"
appearing elsewhere in this Prospectus and the other information incorporated
by reference herein. Except as otherwise indicated, all information contained
in this Prospectus assumes that the Underwriters' over-allotment option is not
exercised. References to "Common Stock" include "Rights" issuable pursuant to
that certain Rights Agreement, entered into in 1986, as amended, providing for
the delivery of a Right, along with each share of Common Stock issued by the
Company. The Company's fiscal year ends on the Sunday closest to March 31, and
the first, second and third fiscal quarters end on the Sunday closest to June
30, September 30 and December 31, respectively. For convenience, the Company
has indicated in this Prospectus that its fiscal years end on March 31, and
that its fiscal quarters end on June 30, September 30 and December 31.
References to fiscal 1991, fiscal 1992, fiscal 1993, fiscal 1994, fiscal 1995
and fiscal 1996 shall indicate the fiscal years ended March 31, 1991, March 29,
1992, March 28, 1993, April 3, 1994, April 2, 1995 and March 31, 1996,
respectively.
 
                                  THE COMPANY
 
  Alpha Industries, Inc. (the "Company") designs and manufactures a broad range
of radio frequency ("RF"), microwave frequency and millimeter wave frequency
monolithic integrated circuits ("MMICs"), ceramic products, discrete
semiconductors, and microwave and millimeter wave components and subsystems for
wireless communications applications. These applications include cellular
telephones, worldwide personal communications services and personal
communications networks ("PCS/PCN"), pagers, specialized mobile radio, wireless
data services and global positioning systems ("GPS"). The Company utilizes
proprietary gallium arsenide ("GaAs"), ceramic and silicon process technologies
to address the needs of wireless communications original equipment
manufacturers ("OEMs") for smaller, less expensive and more power efficient
products.
 
  The wireless communications industry has grown significantly over the past
decade and worldwide demand for wireless communications products continues to
grow. Increased acceptance of existing applications and the emergence of new
applications, including PCS/PCN, direct broadcast satellite television ("DBS
TV"), wireless cable TV and intelligent automobile cruise control and collision
avoidance systems ("automotive collision avoidance systems"), have led to
increased communication traffic and congestion of the historically assigned
frequency bands. In addition, many new and existing wireless applications, such
as GPS, DBS TV and automotive collision avoidance systems require the use of
higher microwave and millimeter wave frequencies to operate effectively. As a
consequence of all of the foregoing factors, wireless communications are moving
from lower RF to higher microwave and millimeter wave frequencies where greater
bandwidths are available.
 
  The Company offers a broad array of complementary products in GaAs, ceramic
and silicon that address a wide portion of the wireless communications
frequency spectrum, including RF, microwave and millimeter wave. This enables
the Company to offer an increasing portion of the "footprint" in the wireless
communications handheld and infrastructure equipment, and gives wireless OEMs
the opportunity to satisfy an increasing percentage of their component needs
from the Company.
 
  The Company gained extensive experience in the design and manufacture of GaAs
MMICs, discrete semiconductors, ceramic products and components and subsystems
for millimeter wave frequencies in military applications. These applications
accounted for approximately 19% of the Company's new orders in the first six
months of fiscal 1996. Over the past several years, the Company has refocused
this knowledge and experience on the wireless communications commercial
markets. As a result, the Company believes that it is well-positioned as higher
frequencies are increasingly used in emerging wireless technologies such as
PCS/PCN infrastructure equipment, wireless cable TV and automotive collision
avoidance systems.
 
  The Company focuses its sales and marketing efforts on the major OEMs in the
wireless communications industry, such as Motorola, Nokia, Ericsson and AT&T,
and their suppliers, with the objective of securing orders
 
                                       4

<PAGE>
 
for high volume, application specific products. With available capacity at its
GaAs fabrication facility, the Company believes that large volume product
orders offer opportunities for economies of scale and improved margins. By
maintaining close relationships with customers and by integrating its design
and manufacturing capabilities, the Company can better anticipate its
customers' needs and rapidly develop customer specific solutions based upon the
Company's core technologies. The Company believes that this approach enhances
the likelihood that the Company's products will be included in its customers'
designs for new wireless communications products.
 
  The Company is a Delaware corporation which was organized in 1962. Unless
otherwise indicated, the term "Company," as used in this Prospectus, refers to
Alpha Industries, Inc., and its subsidiaries. The Company's principal offices
are located at 20 Sylvan Road, Woburn, Massachusetts 01801, and its telephone
number is (617) 935-5150.
 
                                  THE OFFERING
 

<TABLE>
<S>                                <C>
Common Stock offered.............. 2,000,000 shares
Common Stock to be outstanding
 after Offering................... 9,808,722 shares(1)
Use of Proceeds................... Repayment of indebtedness, capital
                                   expenditures consisting primarily of
                                   equipment, working capital, potential
                                   acquisitions and general corporate purposes
American Stock Exchange symbol.... AHA
</TABLE>

- --------
(1) Based on the number of shares of Common Stock outstanding as of September
    30, 1995. Excludes (i) 849,222 shares of Common Stock issuable upon
    exercise of options outstanding under the Company's stock plans at
    September 30, 1995, at a weighted average exercise price of $4.31 per
    share, (ii) 374,261 shares of Common Stock reserved for future issuance
    under the Company's stock plans and (iii) 50,000 shares of Common Stock
    issuable upon exercise of a warrant outstanding at September 30, 1995, at
    an exercise price of $3.75 per share. See "Capitalization."
 
                                       5

<PAGE>
 
                      SUMMARY CONSOLIDATED FINANCIAL DATA
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 

<TABLE>
<CAPTION>
                                                              SIX MONTHS ENDED
                                FISCAL YEAR ENDED MARCH 31,     SEPTEMBER 30,
                                -----------------------------------------------
                                  1993      1994       1995     1994     1995
                                --------- ---------  ----------------- --------
<S>                             <C>       <C>        <C>      <C>      <C>
STATEMENT OF OPERATIONS DATA:
Sales.........................  $ 69,543  $  70,147  $ 78,254 $ 36,928 $ 46,167
Operating income (loss)(1)....    (2,057)   (10,597)    3,997    1,880    2,947
Income (loss) before income
 taxes........................    (2,787)   (11,196)    3,349    1,556    2,583
Net income (loss).............    (2,987)   (11,466)    2,847    1,262    2,195
Net income (loss) per
 share(2).....................  $  (0.40) $   (1.53) $   0.36 $   0.16 $   0.27
Weighted average common shares
 and common share
 equivalents..................     7,464      7,502     7,882    7,744    8,196
</TABLE>

 

<TABLE>
<CAPTION>
                                                          SEPTEMBER 30, 1995
                                                        ----------------------
                                                        ACTUAL  AS ADJUSTED(3)
                                                        ------- --------------
<S>                                                     <C>     <C>
BALANCE SHEET DATA:
Working capital........................................ $11,109    $27,799
Total assets...........................................  52,046     75,161
Short-term debt, including current portion of capital
 lease obligations.....................................   6,250        675
Long-term debt and capital lease obligations, less
 current portion.......................................   2,401      2,401
Stockholders' equity...................................  30,300     58,990
</TABLE>

- --------
(1) In fiscal 1994, the Company recorded repositioning expenses of $5.6
    million, related primarily to the consolidation of certain manufacturing
    facilities in response to a continued decline in defense related business.
    In the six months ended September 30, 1995, the Company recorded a $320,000
    repositioning credit, attributable to the reversal of certain accruals for
    estimated carrying costs, as a result of an earlier than expected
    disposition of the Company's Methuen, Massachusetts facility. See
    "Management's Discussion and Analysis of Financial Condition and Results of
    Operations."
(2) Net income (loss) per share is computed on the basis of the weighted
    average shares of Common Stock outstanding plus common equivalent shares
    arising from the effect of dilutive stock options and warrants, using the
    Treasury Stock Method.
(3) Adjusted to reflect the sale of the 2,000,000 shares of Common Stock
    offered hereby, at an assumed offering price of $15.50 per share, after
    deducting the estimated underwriting discount and related offering expenses
    and application of the estimated net proceeds therefrom. Assumes repayment
    in full of the Company's indebtedness at September 30, 1995 ($5,575,000)
    under its working capital line of credit and capital expenditures in the
    amount of $12.0 million. See "Use of Proceeds" and "Capitalization."
 
                                       6

<PAGE>
 
                                 RISK FACTORS
 
  In evaluating the Company's business, prospective investors should carefully
consider the following factors, in addition to the other information set forth
in this Prospectus and in the documents incorporated by reference herein.
 
HISTORY OF OPERATING LOSSES; REPOSITIONING OF COMPANY'S BUSINESS
 
  The Company has incurred net losses in two of its last three fiscal years.
During the fiscal year ended March 31, 1994, the Company sustained a net loss
of approximately $11.5 million, of which $5.6 million was a repositioning
charge. This charge related primarily to the consolidation of certain
manufacturing operations and workforce reductions in response to a continued
decline in defense related business. The Company anticipates that revenues
from military sales will continue to decline. There can be no assurance that
the Company's effort to reposition itself as a supplier of advanced products
to wireless communications markets will be successful. If revenues from
commercial wireless customers do not continue to grow, or grow less rapidly
than expected, or if in the near term revenues from military sales decline
more rapidly than expected, the Company's operating results could be
materially and adversely affected.
 
VARIABILITY OF OPERATING RESULTS
 
  The Company's quarterly and annual results have varied in the past and may
vary significantly in the future due to a number of factors, including:
cancellation or delay of customer orders; market acceptance of the Company's
or its customers' products; variations in manufacturing yields; timing of
announcement and introduction of new products by the Company and its
competitors; changes in revenue and product mix; competition; changes in
manufacturing capacity and variations in the utilization of this capacity;
variations in average selling prices; variations in operating expenses; the
long sales cycles associated with the Company's customer specific products;
the timing and level of product and process development costs; cyclicality of
the semiconductor and ceramic industries; the timing and level of nonrecurring
engineering revenues and expenses relating to customer specific products; and
changes in inventory levels. Any unfavorable changes in these or other factors
could have a material adverse effect on the Company's operating results. The
Company's expense levels are based, in part, on its expectations as to future
revenue, and certain of these expenses, particularly those relating to the
Company's capital equipment and manufacturing overhead, are relatively fixed
in nature. For example, the Company is investing in GaAs, silicon and ceramic
process development technology in anticipation of increased revenues from
related markets. As a result of the relatively fixed nature of certain of the
Company's expenses, operating results would be disproportionately and
adversely affected by a reduction in revenue. The Company expects that its
operating results will continue to fluctuate in the future as a result of
these and other factors. See "Management's Discussion and Analysis of
Financial Condition and Results of Operations."
 
CUSTOMER CONCENTRATION
 
  Historically, a significant portion of the Company's sales in each fiscal
period has been concentrated among a limited number of customers. This trend
is accelerating, and in recent periods sales to the Company's major customers
as a percentage of total sales have increased. For the first six months of
fiscal 1996, the Company's direct sales to Motorola, Inc. ("Motorola"), Nokia
OY AB ("Nokia"), L.M. Ericsson Telefonaktiebolaget ("Ericsson") and AT&T Corp.
("AT&T") in the aggregate accounted for approximately 18% of the Company's
sales. The Company's direct sales to six other customers believed by the
Company to be suppliers to these four OEMs accounted for an additional 8% of
the Company's sales during such period. In fiscal 1993, 1994 and 1995, direct
sales to these four OEMs and to such six other customers in the aggregate
accounted for approximately 7%, 10%, and 17% of sales, respectively. The
Company does not generally enter into long-term contracts with its customers,
and when it does, the contract is generally terminable for the convenience of
the customer. In the event of an early termination or discontinuance of a
contract by one of the Company's major customers, it is unlikely that the
Company will be able to identify an alternative purchaser for that product.
The Company's business, financial condition and operating results have been
materially and adversely affected in the past by the
 
                                       7

<PAGE>
 
failure of anticipated orders to materialize and by deferrals or cancellations
of orders. If the Company were to lose one of these major customers, or if
orders by a major customer otherwise were to decrease, the Company's business,
financial condition and operating results would be materially and adversely
affected. See "Business--The Alpha Strategy," and "--Customers."
 
DEPENDENCE ON CUSTOMER SPECIFIC PRODUCTS
 
  Most of the Company's products are designed to be incorporated into specific
end-user products. In light of short product life cycles in the wireless
communications industry, the Company's future success depends upon its ability
to select customer specific development projects which will result in
sufficient production volume to enable the Company to recover its development
costs and realize a profit on the project. There can be no assurance that the
Company will be able to select such customer specific projects, or that the
Company's products will be designed into such projects. In addition, OEMs
require that their suppliers design and manufacture components very quickly.
There can be no assurance that the Company will be able to design, manufacture
in large volumes and deliver to its customers high quality, reliable products
within the required time period. The Company has experienced delays in the
production of MMICs, ceramic products and discrete semiconductors under major
contracts with major OEM customers. For example, the Company is experiencing
delays in the production of ceramic products under a major contract with
Motorola. In particular, the Company's ceramic filter has experienced
mechanical difficulty on a new manufacturing line at Motorola, which has
delayed the production of the filters. As a result, Motorola has deferred
production deliveries under this contract. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations." There can be no
assurance that this problem will be resolved or that similar problems will not
recur in the future. Any such problems could have a material and adverse
effect on the Company's operating results.
 
PRODUCT AND PROCESS DEVELOPMENT AND TECHNOLOGICAL CHANGE
 
  The wireless communications industry is characterized by frequent new
product introductions, evolving industry standards and rapid changes in
product and process technologies. The Company believes that its future success
will depend upon its ability to continue to improve its product and process
technologies and develop new technologies. The success of the Company's new
products is dependent upon many factors, including factors that are outside
the Company's control. These factors include: the Company's ability to
anticipate market requirements in its product development efforts; market
acceptance and continued commercial success of OEM products for which the
Company's products have been designed; the ability to adapt to technological
changes and to support established and emerging industry standards; successful
and timely completion of product development and commercialization;
achievement of acceptable wafer fabrication and ceramic process yields and
manufacturing yields generally; and the ability to offer new products at
competitive prices. No assurance can be given that the Company's product and
process development efforts will be successful or that the Company's new
products or those of its customers will achieve or sustain market acceptance.
For example, during fiscal 1995, one of the Company's major customers
discontinued a certain handset in favor of an architecture that excluded a
GaAs MMIC designed by the Company for the product. This change resulted in a
loss of potential revenue to the Company. In addition, the wireless
communications industry is characterized by end-user demands for increased
functionality at ever lower prices. To remain competitive, the Company must
obtain yield and productivity improvements and cost reductions and must
introduce new products which incorporate advanced features and which therefore
can be sold at higher average selling prices. To the extent that such cost
reductions and new product introductions do not occur in a timely manner or
the Company's or its customers' products do not achieve market acceptance, the
Company's operating results could be materially and adversely affected. See
"Business--Manufacturing," and "--Research and Development."
 
MANUFACTURING RISKS: PRODUCT QUALITY, PERFORMANCE AND RELIABILITY
 
  The manufacturing processes for the Company's products, in particular its
GaAs MMICs, are highly complex and precise, requiring advanced and costly
equipment, and are being modified continually in an effort to improve yields
and product performance. The Company expects that its customers will continue
to establish
 
                                       8

<PAGE>
 
demanding specifications for quality, performance and reliability that must be
met by the Company's products. The Company has limited experience in high
volume manufacturing of certain GaAs MMICs and ceramic products for the high
volume commercial applications on which its current product development, sales
and marketing efforts are focused. The Company has encountered and may in the
future encounter development and manufacturing delays, has from time to time
failed and may in the future fail to meet its customers' contractual
specifications, and one or more of its products have contained and may in the
future contain undetected defects or failures when first introduced or after
commencement of commercial shipments. If such delays, defects or failures
occur, the Company could experience lost revenue, resulting from delays in or
cancellations or rescheduling of orders or shipments, product returns or
discounts, or could experience increased costs, including product or process
redesign, warranty expense or costs associated with customer support, any of
which could have a material adverse effect on the Company's operating results.
There can be no assurance that the Company will not in the future experience
significant product quality, performance or reliability problems. See
"Business--Manufacturing."
 
MANAGEMENT OF GROWTH
 
  The growth in the Company's business, and its continuing transition from
military to commercial sales, has placed, and is expected to continue to place,
a significant strain on the Company's personnel, management and other
resources. In order to manage any future growth effectively, the Company will,
among other things, be required to upgrade and expand certain manufacturing
facilities; attract, train, motivate and manage employees successfully; and
continue to improve its operational and financial systems. There can be no
assurance that the Company will be successful in these respects. The Company is
currently in the process of implementing a new management information system.
There can be no assurance that the Company will not encounter problems or
increased expense levels in connection with implementing its new management
information system. In addition, the Company anticipates that any future growth
of its business will require increased utilization of the Company's
manufacturing capacity, including increasing the number of shifts during which
its manufacturing facilities are operational. Further, any such future growth
could require improvement or expansion of the Company's existing manufacturing
facilities. The Company's ceramic manufacturing facility is currently running
near its installed equipment capacity. Capacity constraints at this facility
have caused and continue to cause production delays. Any such delays could have
a material adverse effect on the Company's results of operations. As a result,
the Company is planning to expand its ceramic manufacturing capacity. See "Use
of Proceeds." Expansion or upgrade of the Company's manufacturing facilities
will entail substantial capital expenditures. Lead times for certain capital
equipment are long, and modification of the Company's facilities and
installation of such equipment is a complex process which could disrupt the
Company's ongoing manufacturing operations. Delays in completion of a planned
expansion or upgrade could limit the ability of the Company to respond to the
rapid design and production cycles required by its customers. Moreover, there
can be no assurance that the Company will be able to secure sources of capital
adequate to fund the necessary expenditures. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations--Financial
Condition." The Company could experience product quality, performance or
reliability problems and development and manufacturing delays in connection
with any such increase in utilization or such expansion or upgrade of the
Company's manufacturing capacity. The occurrence of any such problems or the
inability of the Company otherwise to manage any future growth effectively
could materially and adversely affect the Company's operating results.
 
ADOPTION OF GAAS COMPONENTS BY OEMS
 
  Silicon semiconductor technologies are the dominant process technologies for
certain integrated circuits and these technologies continue to improve in
performance. Many of the Company's OEM customers utilize silicon devices and
currently are using or evaluating the use of GaAs. To date, certain OEMs have
been reluctant to utilize GaAs technologies because of perceived risks relating
to GaAs technology, including a lack of experience in designing systems with
GaAs products, unfamiliar and more expensive manufacturing processes and
uncertainties about the relative cost effectiveness of GaAs products compared
to silicon devices. There can be no assurance that GaAs technology will achieve
widespread market acceptance. See "Business--The Alpha Strategy," and "--
Competition."
 
                                       9

<PAGE>
 
  The production of GaAs integrated circuits is more costly than the
production of silicon devices. This cost differential relates primarily to
higher costs of the raw wafer material, lower production yields associated
with the relatively immature GaAs technology and higher unit costs associated
with lower production volumes. The Company believes its costs of producing
GaAs integrated circuits will continue to exceed the costs associated with the
production of silicon devices. As a result, the Company must offer devices
which provide superior performance to that of silicon for specific
applications in order to be competitive with silicon devices. There can be no
assurance that the Company can continue to identify markets which require
performance superior to that offered by silicon solutions, or that the Company
will continue to offer products which provide sufficiently superior
performance to offset the cost differential. See "Business--Competition."
 
ENVIRONMENTAL REGULATIONS
 
  The Company is subject to a variety of federal, state and local laws, rules
and regulations related to the use, handling, discharge or disposal of toxic,
volatile or other hazardous chemicals used in its manufacturing process and to
the presence of hazardous chemicals on properties owned or operated by the
Company. The failure to comply with present or future environmental
regulations could result in substantial fines being imposed on the Company,
suspension of production or a cessation of operations. The Company has been
engaged in environmental assessment and remediation activities at its
Adamstown, Maryland facility since 1989, due to contamination of groundwater
at such facility. In 1989, the Company entered into a consent decree with the
State of Maryland Department of the Environment pursuant to which it has until
recently operated a groundwater remediation system. Based on groundwater test
results, the Company has suspended operation of the remediation system. The
Company is continuing to monitor the presence of contaminants in groundwater
at its Adamstown facility and is prepared to resume operation of the
groundwater remediation system if necessary. In addition, the Company has been
notified by federal and state environmental agencies of its potential
liability with respect to two Superfund sites, to which small quantities of
the Company's hazardous waste were shipped. There can be no assurance that the
Company's remediation activities or any liability concerning the Superfund
sites will not have a material adverse effect on the Company. However, the
Company believes that its volumetric contribution of waste to the two
Superfund sites is de minimis and that the extent of its liability with
respect to these sites is not likely to be material. The Company could be
required to acquire significant equipment, or incur substantial other expenses
in order to comply with environmental regulations. Any failure by the Company
to comply with applicable law in the use, handling or disposal of hazardous
substances or in management of real property could subject the Company to
substantial future liabilities.
 
DEPENDENCE ON KEY PERSONNEL
 
  The Company's future success depends in large part on the continued service
of its key technical, marketing and management personnel, and on its ability
to identify, attract and retain qualified technical personnel, particularly
highly skilled design, process and test engineers involved in the manufacture
of existing products and the development of new products and processes. The
competition for such personnel is intense, and the loss of key employees could
have a material adverse effect on the Company.
 
CYCLICALITY OF THE COMPANY'S MARKETS
 
  While the semiconductor and ceramic markets have in the past experienced
overall growth, they have historically been characterized by wide fluctuations
in product supply and demand. From time to time, these industries have also
experienced significant downturns, often in connection with, or in
anticipation of, maturing product cycles and declines in general economic
conditions. These downturns have been characterized by diminished product
demand, production overcapacity and subsequent accelerated price erosion, and
in some cases have lasted for extended periods of time. The Company's business
may in the future be materially and adversely affected by industry-wide
fluctuations. The Company's continued success will depend in large part on the
continued growth of the wireless communications industry. Certain of the
Company's major OEM customers have recently announced a softening of demand
for certain of their cellular products. No assurance can be given that the
Company will not be adversely affected in the future by cyclical conditions in
the wireless communications industry.
 
 
                                      10

<PAGE>
 
LIMITED SOURCES OF MATERIALS AND SERVICES
 
  The Company currently procures certain components and services for its
products from single or limited sources. For example, the Company currently
procures GaAs substrates, a critical raw material, from only two sources. In
addition, excluding the GaAs wafers it produces internally, the Company
outsources the fabrication of GaAs wafers to a single external foundry.
Further, the Company currently procures silicon substrates for semiconductors
and certain chemical powders for ceramic manufacturing from single sources.
The Company purchases these materials and services on a purchase order basis,
does not carry significant inventories and does not have any long-term supply
contracts with its source vendors. The inability of the Company to obtain
these materials in required quantities would result in significant delays or
reductions in product shipments, which would materially and adversely affect
the Company's operating results. The Company from time to time experiences
delays in receiving products from certain of its vendors, and no assurance can
be given that similar problems will not recur. If the Company were to change
certain of its vendors, the Company would be required to requalify the
components supplied by such vendors. Requalification could prevent or delay
product shipments, which would materially and adversely affect the Company's
operating results. Additionally, prices could increase significantly in
connection with changes of vendors. The Company's reliance on single and
limited sources involves several additional risks, including reduced control
over the price, timely delivery, reliability and quality of the components.
Any inability of the Company to obtain timely deliveries of materials of
acceptable quality, or a significant increase in the prices of materials,
could materially and adversely affect the Company's operating results.
 
DEPENDENCE ON ASSEMBLY SUBCONTRACTORS
 
  The Company uses assembly subcontractors located outside the United States
to package and wirebond certain large volume orders of integrated circuits.
The Company attempts to maintain more than one qualified service supplier for
each assembly process, but has been unable at times to achieve this goal
because of minimum volume requirements, service quality issues or other
factors. The Company has, from time to time, experienced problems procuring
assembly services, and no assurance can be given that similar problems will
not recur. For example, in the first quarter of fiscal 1996, a major foreign
subcontractor discontinued operations without notice, resulting in procurement
difficulties, increased costs and product shipment delays. The Company's
inability to obtain sufficient high quality and timely assembly service, or
the loss of any of its current assembly vendors, would result in delays or
reductions in product shipment, and/or reduced product yields, any of which
would materially and adversely affect the Company's operating results. See
"Business--Manufacturing."
 
COMPETITION
 
  Wireless communications markets are intensely competitive and are
characterized by rapid technological change, rapid product obsolescence and
price erosion. Currently, the Company competes primarily with manufacturers of
high performance GaAs MMICs, discrete silicon semiconductors, ceramic filters
and other ceramic products and microwave and millimeter wave components and
subsystems. The Company expects increased competition both from existing
competitors and others which may enter these markets, as well as potential
future competition from companies which may offer new or emerging
technologies, such as surface acoustic wave filters, silicon germanium and
other silicon technologies. In addition, many of the Company's customers,
particularly its largest customers, have or could acquire the capability to
develop or manufacture products competitive with those that have been or may
be developed or manufactured by the Company. The Company's future operating
results may depend in part upon the extent to which these customers elect to
purchase from outside sources rather than develop and manufacture their own
systems. A number of the Company's competitors have significantly greater
financial, technical, manufacturing and marketing resources than the Company.
The ability of the Company to compete successfully depends in part upon the
ability of the Company to develop price competitive, high quality solutions
for OEMs and the extent to which customers select the Company's products over
competitors' products for their systems. There can be no assurance that the
Company will be able to compete successfully in the future. See "Business--
Competition."
 
 
                                      11

<PAGE>
 
GOVERNMENT CONTRACTS
 
  Although the Company has reduced its dependence upon sales to the United
States and foreign governments, a significant portion of the Company's
revenues continue to be derived from such sales. Approximately 49%, 40%, 29%
and 19% of the Company's new orders were derived from United States and
foreign military and defense related sources in fiscal 1993, 1994 and 1995,
and for the first six months of fiscal 1996, respectively. Significant
reductions or delays in procurements of the Company's products by the United
States or any foreign government would have a material adverse effect on the
Company's operating results. Generally, the United States Government and its
contractors and subcontractors may terminate their contracts with the Company
for cause or for convenience, upon certain terms and conditions. The Company
has in the past experienced termination of government contracts. There can be
no assurance that termination of contracts will not occur in the future.
Termination of government contracts or subcontracts having a significant
dollar value would have a material adverse effect on the Company's operating
results.
 
GOVERNMENTAL REGULATION OF COMMUNICATIONS INDUSTRY
 
  The wireless communications industry is heavily regulated. The sale of
equipment by OEMs who purchase the Company's products may be materially and
adversely affected by governmental regulatory policies, the imposition of
common carrier tariffs or taxation of telecommunications services. The delays
inherent in the governmental approval process may in the future cause the
cancellation, postponement or rescheduling of the installation of wireless
communications systems. These delays may have a material adverse effect on the
Company's operating results.
 
DIFFICULTY IN PROTECTING INTELLECTUAL PROPERTY
 
  The Company's ability to compete is affected by its ability to protect its
proprietary information. The Company relies primarily on trade secret laws,
confidentiality procedures and licensing arrangements to protect its
intellectual property rights. In addition, where appropriate, the Company
seeks patent protection. The Company currently has patents granted and pending
in the United States, and intends to seek further patents on its technology.
There can be no assurance that patents will issue from any of the Company's
pending or any future applications or that any claims allowed from such
applications will be of sufficient scope or strength, or be issued in all
countries where the Company's products can be sold, to provide meaningful
protection or any commercial advantage to the Company. Also, competitors of
the Company may be able to design around the Company's patents. The laws of
certain foreign countries in which the Company's products are or may be
developed, manufactured or sold may not protect the Company's products or
intellectual property rights to the same extent as do the laws of the United
States and thus make the possibility of piracy of the Company's technology and
products more likely. Although the Company intends to defend its intellectual
property, there can be no assurance that the steps taken by the Company to
protect its proprietary information will be adequate to prevent
misappropriation of its technology or that the Company's competitors will not
independently develop technologies that are substantially equivalent or
superior to the Company's technology.
 
INTELLECTUAL PROPERTY CLAIMS
 
  The semiconductor industry is characterized by vigorous protection and
pursuit of intellectual property rights, which has resulted in significant and
often protracted and expensive litigation. Although there is currently no
pending intellectual property litigation against the Company, the Company from
time to time is notified of claims that the Company may be infringing patents
or other intellectual property rights owned by third parties. A former
customer of the Company has notified the Company that the customer believes
that a patent held by the customer, and a related agreement between the
customer and the Company, preclude the Company from manufacturing for others,
components for low power point-to-multi-point multi-function cellular
television systems operating at certain millimeter wave frequencies without a
license from, and the consent of, the customer. The Company, after
consultation with counsel, believes that the patent in question is invalid.
However, the invalidity of any patent must be determined by a court, and there
can be no assurance that a court would find such patent invalid. The Company
does not believe that its agreement with the customer, if enforceable, would
 
                                      12

<PAGE>
 
have a material adverse effect on the Company's future results of operations.
If it is necessary or desirable, the Company may seek licenses under patents or
other intellectual property rights asserted by others, or may attempt to
develop non-infringing technology. However, there can be no assurance that
licenses will be offered or that the terms of any offered licenses will be
acceptable to the Company, or that the Company will be successful in developing
non-infringing technology. The failure to obtain a license from a third party
for technology used by the Company could cause the Company to incur substantial
liabilities and to suspend the manufacture of products. Furthermore, the
Company may initiate claims or litigation against third parties for
infringement of the Company's proprietary rights, or to establish the validity
of the Company's proprietary rights. Litigation by or against the Company could
result in significant expense to the Company and divert the efforts of the
Company's technical and management personnel, whether or not such litigation
results in a favorable determination for the Company. In the event of an
adverse result in any such litigation, the Company could be required to pay
substantial damages, cease the manufacture, use and sale of infringing
products, expend significant resources to develop non-infringing technology,
discontinue the use of certain processes or obtain licenses to the infringing
technology. There can be no assurance that the Company would be successful in
such development or that such licenses would be available on reasonable terms,
and any such development or license could require expenditures by the Company
of substantial time and other resources. In the event that any third party
makes a successful claim against the Company or its customers, and a license is
not made available to the Company on commercially reasonable terms, the
Company's business, financial condition and operating results would be
adversely affected. See "Business--Intellectual Property."
 
RISKS OF INTERNATIONAL SALES
 
  Sales outside of the United States were approximately $18.6 million, $22.8
million, $23.3 million and $15.4 million in fiscal 1993, 1994 and 1995, and for
the six months ended September 30, 1995, respectively. International sales
involve a number of inherent risks, including imposition of government
controls, currency exchange fluctuations, potential insolvency of international
distributors and representatives, reduced protection for intellectual property
rights in some countries, the impact of recessionary environments in economies
outside the United States, political instability and generally longer
receivables collection periods, as well as tariffs and other trade barriers. In
addition, due to the technological advantage provided by GaAs in many military
applications, a substantial portion of the Company's sales outside of North
America must be licensed by the Bureau of Export Administration of the United
States Department of Commerce or the Office of Defense Trade Controls of the
United States Department of State. Although to date the Company has experienced
no difficulty in obtaining these licenses, failure to obtain such licenses in
the future could have a material adverse effect on the Company's operating
results. Furthermore, because most of the Company's foreign sales are
denominated in United States dollars, the Company's products become less price
competitive in countries whose currencies decline in value against the dollar.
There can be no assurance that these factors will not have an adverse effect on
the Company's future international sales and, consequently, on the Company's
business, operating results and financial condition. See "Business--Sales and
Marketing."
 
IMPEDIMENTS TO CHANGES IN CONTROL
 
  The Company's Restated Certificate of Incorporation and Amended and Restated
Bylaws include certain provisions that may have the effect of discouraging or
preventing a change in control of the Company. In addition, the Company made a
rights distribution in November, 1986 that could also have the effect of
discouraging or preventing a change in control of the Company. These provisions
could limit the price that stockholders of the Company might receive in the
future for shares of the Common Stock. See "Description of Capital Stock and
Other Matters."
 
POTENTIAL VOLATILITY OF STOCK PRICE
 
  The market price of the shares of Common Stock has recently been and is
likely to continue to be highly volatile and materially affected by factors
such as fluctuations in the Company's operating results, announcements of
technological innovations or new products by the Company or its competitors,
governmental regulatory action, developments with respect to patents or
proprietary rights, general market conditions and other
 
                                       13

<PAGE>
 
factors. In addition, the stock market has from time to time experienced
significant price and volume fluctuations that are unrelated to the operating
performance of particular companies. In the event that in some future quarter
the Company's net sales or operating results were to be below the expectations
of public market securities analysts and investors, the price of the Company's
Common Stock could be materially and adversely affected. See "Price Range of
Common Stock."
 
SHARES ELIGIBLE FOR FUTURE SALE
 
  Upon completion of this offering, the Company will have 9,808,722 shares of
Common Stock outstanding (10,108,722 shares if the Underwriters' over-
allotment option is exercised in full), of which 8,165,960 shares of Common
Stock (8,465,960 shares if the Underwriters' over-allotment option is
exercised in full) will be freely tradable without restriction or further
registration under the Securities Act of 1933, as amended (the "Securities
Act"), by persons other than "affiliates" of the Company. The remaining
1,642,762 shares of Common Stock held by stockholders who may be deemed to be
"affiliates" of the Company under Rule 144 of the Securities Act, may only be
resold pursuant to a registration statement under the Securities Act or an
exemption from such registration, including exemptions provided by Rule 144
thereunder. All of the Company's officers and directors, holding an aggregate
of 497,692 shares of Common Stock (including 396,400 shares of Common Stock
issuable under stock options that are or will become vested as of 90 days from
the date of this Prospectus), have agreed that they will not, without the
prior written consent of Montgomery Securities, on behalf of the Underwriters,
directly or indirectly, offer, sell, contract to sell, make any short sale,
pledge, establish a "put equivalent position" within the meaning of Rule 16a-
1(h) under the Exchange Act, or otherwise dispose of any shares of Common
Stock, options to acquire shares of Common Stock or any securities convertible
or exchangeable for shares of Common Stock, or publicly announce the intention
to do any of the foregoing, for a period of 90 days from the date of this
Prospectus, subject to certain exceptions. In addition, the Company has agreed
in the Underwriting Agreement that, without the prior written consent of
Montgomery Securities, on behalf of the Underwriters, it will not issue,
offer, sell or grant shares of Common Stock or options to purchase such shares
(other than options or shares granted or issued pursuant to the Company's 1986
Long-Term Incentive Plan, Savings and Retirement Plan, 1994 Non-Qualified
Stock Option Plan for Non-Employee Directors, Employee Stock Purchase Plan and
an outstanding warrant to purchase 50,000 shares of Common Stock) or otherwise
dispose of the Company's equity securities, or any other securities
convertible into or exchangeable for the Company's Common Stock or other
equity securities, for a period of 90 days after the first date that any
shares of Common Stock are released for sale in this offering. See
"Underwriting." Immediately following this offering, the Company will have
outstanding options to purchase an aggregate of 849,222 shares of Common
Stock, of which options to purchase an aggregate of 501,527 shares of Common
Stock are currently exercisable. Outstanding options to purchase an aggregate
of approximately 25,835 additional shares of Common Stock will become
exercisable within six months of the date of this Prospectus. In addition, the
Company has reserved an aggregate of 374,261 shares of Common Stock for
issuance pursuant to the Company's stock plans. All of the shares issuable
pursuant to the Company's stock plans are registered under the Securities Act
on Registration Statements on Form S-8. Shares issued to nonaffiliates upon
the exercise of options generally will be freely tradable without restriction
or further registration under the Securities Act. Sales of substantial amounts
of Common Stock in the public market following this offering could have a
material adverse effect on prevailing market prices for the Common Stock.
 
                                USE OF PROCEEDS
 
  The net proceeds to the Company from the sale of the 2,000,000 shares of
Common Stock offered by the Company hereby are estimated to be $28,690,000
($33,061,000 if the Underwriters' over-allotment option is exercised in full),
assuming a public offering price of $15.50 per share, after deduction of the
estimated underwriting discount and estimated offering expenses payable by the
Company.
 
  The Company expects to use the net proceeds for repayment of indebtedness
and capital expenditures, and the balance for working capital, potential
acquisitions and general corporate purposes. The indebtedness to be repaid
consists of all or a portion of the Company's bank working capital line of
credit, currently at $5.4 million as of October 25, 1995. Planned capital
expenditures consist of approximately $12 million over the next 12 months,
primarily for the expansion of the Company's ceramic manufacturing capacity in
Maryland and for
 
                                      14

<PAGE>
 
capital equipment for use in its GaAs MMIC fabrication facility, all or a
portion of which expenditures are expected to be funded from the net proceeds
of this offering.
 
  The Company's bank indebtedness consists of a $6.5 million working capital
line of credit and a $5.0 million equipment line of credit. These lines of
credit are secured by security interests in substantially all of the Company's
assets, excluding real property. The expiration dates for the working capital
and equipment lines of credit are August 1, 1997 and July 31, 1996,
respectively. The maturity date for loans under the working capital line of
credit is August 1, 1997 and the maturity date for loans under the equipment
line of credit is August 1, 1999. Advances under both lines of credit bear
interest at a fluctuating rate equal to the prime rate or, at the Company's
option, LIBOR plus 200 basis points. As of October 25, 1995, the amounts drawn
under the working capital line of credit and the equipment line of credit were
$5.4 million and $1.0 million, respectively.
 
  With respect to potential acquisitions, the Company may use a portion of the
net proceeds to acquire businesses, products or technologies complementary to
the Company's current business, although it has no such commitments, and no
such acquisitions are currently being negotiated or planned. The specific
timing and amount of funds required for specific uses by the Company cannot be
precisely determined at this time. Pending such uses, the Company intends to
invest in short-term, investment grade, interest-bearing obligations.
 
                                DIVIDEND POLICY
 
  The Company has not paid cash dividends on its Common Stock since fiscal
1986, and the Company does not anticipate paying cash dividends in the
foreseeable future. Any future determination to pay cash dividends will be at
the discretion of the Board of Directors and will be dependent upon the
Company's financial condition, operating results, capital requirements,
general business conditions and such other factors as the Board of Directors
deems relevant. The Company is subject to financial and operating covenants,
including a prohibition against the payment of cash dividends, under its bank
financing agreements.
 
                          PRICE RANGE OF COMMON STOCK
 
  The Company's Common Stock is traded on the American Stock Exchange under
the symbol AHA. The following table sets forth, for the periods indicated, the
high and low sale prices for the Common Stock, as reported on the American
Stock Exchange.
 

<TABLE>
<CAPTION>
                                                                  HIGH     LOW
                                                                -------- -------
   <S>                                                          <C>      <C>
   FISCAL 1994:
   First Quarter............................................... $ 3 5/8  $ 2 5/8
   Second Quarter..............................................   6 3/8    3
   Third Quarter...............................................   6        4
   Fourth Quarter..............................................   4 9/16   3 1/8
   FISCAL 1995:
   First Quarter...............................................   4 1/2    3
   Second Quarter..............................................   6 7/8    3 7/8
   Third Quarter...............................................   7 3/8    5 1/4
   Fourth Quarter..............................................  11 5/8    6 3/8
   FISCAL 1996:
   First Quarter...............................................  15 1/4   10 5/8
   Second Quarter..............................................  19 5/8   14 1/8
   Third Quarter (through October 25, 1995)....................  17 7/8   13 3/4
</TABLE>

 
  The last reported sale price of the Common Stock on the American Stock
Exchange on October 30, 1995 was $15.50 per share.
 
                                      15

<PAGE>
 
                                 CAPITALIZATION
 
  The following table sets forth the actual capitalization of the Company as of
September 30, 1995 and as adjusted to reflect the sale by the Company of the
2,000,000 shares of Common Stock offered hereby at an assumed public offering
price of $15.50 per share, after deducting the estimated underwriting discount
and related offering expenses and application of the estimated net proceeds
thereof as if such transactions were consummated on September 30, 1995.
 

<TABLE>
<CAPTION>
                                                            SEPTEMBER 30, 1995
                                                            -------------------
                                                            ACTUAL  AS ADJUSTED
                                                            ------- -----------
                                                              (IN THOUSANDS)
<S>                                                         <C>     <C>
Notes payable, bank (1).................................... $ 5,575   $    -
Current portions of long-term debt and capital lease
 obligations...............................................     675       675
                                                            =======   =======
Long-term debt, less current portion.......................   1,617     1,617
Capital lease obligations, less current portion............     784       784
Stockholders' equity:
  Common Stock, par value $.25 per share: authorized
   30,000,000 shares; issued 8,054,774 shares, actual and
   10,054,774 shares, as adjusted (2)......................   2,014     2,514
  Additional paid-in capital...............................  28,335    56,525
Retained earnings..........................................     457       457
                                                            -------   -------
                                                             30,806    59,496
Less--Treasury shares 246,052 shares at cost...............     311       311
   Unearned compensation--restricted stock.................     195       195
                                                            -------   -------
    Total stockholders' equity............................. $30,300   $58,990
                                                            -------   -------
    Total capitalization................................... $32,701   $61,391
                                                            =======   =======
</TABLE>

- --------
(1) At October 25, 1995, the outstanding balance was $5.4 million.
(2) Excludes (i) 849,222 shares of Common Stock issuable upon exercise of stock
    options outstanding at September 30, 1995, at a weighted average exercise
    price of $4.31 per share, (ii) 133,825 shares of Common Stock reserved for
    issuance pursuant to the Company's Employee Stock Purchase Plan, (iii)
    205,436 shares of Common Stock reserved for issuance pursuant to the
    Company's 1986 Long-Term Incentive Plan, (iv) 35,000 shares of Common Stock
    reserved for issuance pursuant to the Company's 1994 Non-Qualified Stock
    Option Plan For Non-Employee Directors, and (v) 50,000 shares of Common
    Stock issuable upon exercise of a warrant outstanding at September 30,
    1995, at an exercise price of $3.75 per share.
 
                                       16

<PAGE>
 
                     SELECTED CONSOLIDATED FINANCIAL DATA
 
  The following selected consolidated financial data of the Company for fiscal
1991 through fiscal 1995 have been derived from the consolidated financial
statements of the Company, which have been audited by KPMG Peat Marwick LLP.
The selected consolidated financial data for the six months ended September
30, 1994 and 1995 are derived from unaudited financial statements. Selected
Consolidated Financial Data should be read in conjunction with "Management's
Discussion and Analysis of Financial Condition and Results of Operations,"
included elsewhere in this Prospectus. Unaudited data for the six months ended
September 30, 1994 and 1995 include, in the opinion of management, all
adjustments (consisting only of normal, recurring accruals) necessary to state
fairly the information set forth therein. Operations for the six months ended
September 30, 1995 are not necessarily indicative of the results that may be
expected for the fiscal year ending March 31, 1996.
 

<TABLE>
<CAPTION>
                                                                       SIX MONTHS ENDED
                                FISCAL YEAR ENDED MARCH 31,              SEPTEMBER 30,
                          -------------------------------------------  ------------------
                           1991     1992    1993      1994     1995      1994      1995
                          -------  ------- -------  --------  -------  --------  --------
                                    (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                       <C>      <C>     <C>      <C>       <C>      <C>       <C>
INCOME STATEMENT DATA:
Sales...................  $66,344  $71,032 $69,543  $ 70,147  $78,254  $ 36,928  $ 46,167
                          -------  ------- -------  --------  -------  --------  --------
Costs and expenses:
 Cost of sales..........   44,127   51,055  52,404    55,395   54,376    25,913    30,888
 Research and
  development...........    2,825    3,873   2,915     3,429    4,154     1,798     3,915
 Selling and
  administrative........   16,484   16,074  16,281    16,281   15,727     7,337     8,737
 Repositioning expenses
  (credit)(1)...........       -        -       -      5,639       -         -       (320)
                          -------  ------- -------  --------  -------  --------  --------
  Total costs and
   expenses.............   63,436   71,002  71,600    80,744   74,257    35,048    43,220
                          -------  ------- -------  --------  -------  --------  --------
Operating income
 (loss).................    2,908       30  (2,057)  (10,597)   3,997     1,880     2,947
Other income (expense),
 net....................     (659)     161    (730)     (599)    (648)     (324)     (364)
                          -------  ------- -------  --------  -------  --------  --------
Income (loss) before
 income taxes...........    2,249      191  (2,787)  (11,196)   3,349     1,556     2,583
Provision for income
 taxes..................      943       78     200       270      502       294       388
                          -------  ------- -------  --------  -------  --------  --------
Income (loss) before
 extraordinary item.....    1,306      113  (2,987)  (11,466)   2,847     1,262     2,195
Extraordinary item--
 utilization of net
 operating loss
 carryforward...........      504        9      -         -        -         -         -
                          -------  ------- -------  --------  -------  --------  --------
Net income (loss).......  $ 1,810  $   122 $(2,987) $(11,466) $ 2,847  $  1,262  $  2,195
                          =======  ======= =======  ========  =======  ========  ========
Per share data:
 Income (loss) before
  extraordinary item....  $  0.18  $  0.02 $ (0.40) $  (1.53) $  0.36  $   0.16  $   0.27
 Extraordinary item.....     0.07       -       -         -        -         -         -
                          -------  ------- -------  --------  -------  --------  --------
 Net income (loss) per
  share.................  $  0.25  $  0.02 $ (0.40) $  (1.53) $  0.36  $   0.16  $   0.27
                          =======  ======= =======  ========  =======  ========  ========
Weighted average common
 shares and common share
 equivalents............    7,246    7,429   7,464     7,502    7,882    7 ,744     8,196
                          =======  ======= =======  ========  =======  ========  ========
<CAPTION>
                                         MARCH 31,                       SEPTEMBER 30,
                          -------------------------------------------    -------------
                           1991     1992    1993      1994     1995          1995
                          -------  ------- -------  --------  -------    ------------
                                                (IN THOUSANDS)
<S>                       <C>      <C>     <C>      <C>       <C>      <C>       <C>
BALANCE SHEET DATA:
Working capital.........  $14,454  $17,800 $15,767  $  8,981  $10,983       $11,109
Total assets............   57,071   53,211  53,777    44,430   50,167        52,046
Long-term debt,
 including current
 portion................    5,664    5,349   5,422     5,180    5,083         1,884
Other long-term
 liabilities............      434      350     465       395      794           886
Capital lease
 obligations, including
 current portion........       -        -    1,265     1,263    1,124         1,192
Stockholders' equity....   38,233   38,456  35,565    24,261   27,674        30,300
</TABLE>

- --------
(1) In fiscal 1994, the Company recorded repositioning expenses of $5.6
    million, related primarily to the consolidation of certain manufacturing
    facilities in response to a continued decline in defense related business.
    In the six months ended September 30, 1995, the Company recorded a
    $320,000 repositioning credit, attributable to the reversal of certain
    accruals for estimated carrying costs, as a result of an earlier than
    expected disposition of the Company's Methuen, Massachusetts facility.
 
                                      17

<PAGE>
 

                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
OVERVIEW
 
  Historically, the Company has derived a substantial portion of its revenues
from sales to military customers. However, over the past several years, the
Company has been reducing its reliance on military business and increasing its
emphasis on the commercial wireless market. In fiscal 1993, orders from
military customers accounted for approximately 49% of the Company's total
orders. Since fiscal 1993, this percentage has declined steadily. Orders from
commercial customers have increased in dollar amount, and also have increased
as a percentage of the Company's total orders, from 60% in fiscal 1994, to 71%
in fiscal 1995 and 81% for the first six months of fiscal 1996.
 
  In fiscal 1994, the Company consolidated certain manufacturing operations,
reduced its work force, and took other steps to reduce operating costs
relating to its declining military business. As a result, during the fourth
quarter of fiscal 1994, the Company took a repositioning charge of $5.6
million, primarily attributable to severance costs, consolidation costs and a
write-down to reduce the carrying value of its Methuen, Massachusetts
facility, which had been used primarily to manufacture products for military
customers. This repositioning charge contributed to the Company's operating
loss of $10.6 million in fiscal 1994.
 
  The Company's research and development efforts relating to the military
market have been funded primarily by its military customers. As the Company
has reduced its emphasis on military programs, the amount of the Company's
customer-sponsored research and development has diminished. At the same time,
Company-sponsored research and development costs have increased, from $2.9
million in fiscal 1993, to $3.4 million in fiscal 1994, $4.2 million in fiscal
1995 and $3.9 million for the first six months of fiscal 1996, constituting
20%, 25%, 33% and 57% of the Company's total research and development
expenditures for such periods, respectively.
 
  Because increases in Company-sponsored research and development have been
more than offset by the decline in customer-sponsored expenditures, the
Company's total expenditures on research and development have decreased since
fiscal 1993, from $14.6 million in that year, to $13.8 million in fiscal 1994,
$12.4 million in fiscal 1995 and $6.8 million in the first six months of
fiscal 1996, and have diminished as a percentage of the Company's sales from
21% to 20%, 16% and 15% for such periods, respectively.
 
  Company-sponsored research and development is focused on the development of
new and enhanced commercial products and related process technologies. In
contrast, customer-sponsored research and development has generally been
directed towards objectives defined by the Company's military customers. The
Company intends to continue to increase its expenditures on Company-sponsored
research and development which the Company believes will be more effective in
furthering the Company's strategy than customer-sponsored research and
development.
 
  Expenditures on customer-sponsored research and development that are
reimbursed by the customer are included both in sales and cost of sales.
Company-sponsored research and development is reflected in research and
development expense. The Company's gross margins are affected by the mix of
Company-sponsored and customer-sponsored research and development, since
research and development expenditures reimbursed by the customer are included
in cost of sales rather than in research and development expense. The
increased reliance by the Company on Company-sponsored research and
development and the decline in customer-sponsored research and development
have been a factor contributing to increases in the Company's gross margins
since fiscal 1994.
 
                                      18

<PAGE>
 
RESULTS OF OPERATIONS
 
  The following table sets forth selected consolidated income statement data
expressed as a percentage of sales for the periods indicated.
 

<TABLE>
<CAPTION>
                                                               SIX MONTHS ENDED
                           FISCAL YEAR ENDED MARCH 31,           SEPTEMBER 30,
                          -----------------------------------  ----------------
                          1991   1992   1993    1994    1995     1994      1995
                          -----  -----  -----   -----   -----  --------  --------
<S>                       <C>    <C>    <C>     <C>     <C>    <C>       <C>
Sales...................  100.0% 100.0% 100.0%  100.0%  100.0%    100.0%    100.0%
                          -----  -----  -----   -----   -----  --------  --------
Costs and expenses:
 Cost of sales..........   66.5   71.9   75.4    79.0    69.5      70.2      66.9
 Research and develop-
  ment..................    4.3    5.5    4.2     4.9     5.3       4.9       8.5
 Selling and administra-
  tive..................   24.8   22.6   23.4    23.2    20.1      19.8      18.9
 Repositioning expenses
  (credit)..............     -      -      -      8.0      -         -       (0.7)
                          -----  -----  -----   -----   -----  --------  --------
  Total costs and ex-
   penses...............   95.6  100.0  103.0   115.1    94.9      94.9      93.6
                          -----  -----  -----   -----   -----  --------  --------
Operating income
 (loss).................    4.4    0.0   (3.0)  (15.1)    5.1       5.1       6.4
Other income (expense),
 net....................   (1.0)   0.3   (1.0)   (0.9)   (0.8)     (0.9)     (0.8)
                          -----  -----  -----   -----   -----  --------  --------
Income (loss) before in-
 come taxes.............    3.4    0.3   (4.0)  (16.0)    4.3       4.2       5.6
Provision for income
 taxes..................    1.4    0.1    0.3     0.3     0.7       0.8       0.8
                          -----  -----  -----   -----   -----  --------  --------
Income (loss) before ex-
 traordinary item.......    2.0    0.2   (4.3)  (16.3)    3.6       3.4       4.8
Extraordinary item--uti-
 lization of net operat-
 ing loss carryforward..    0.7     -      -       -       -         -         -
                          -----  -----  -----   -----   -----  --------  --------
Net income (loss).......    2.7%   0.2%  (4.3)% (16.3)%   3.6%      3.4%      4.8%
                          =====  =====  =====   =====   =====  ========  ========
</TABLE>

 
  SIX MONTHS ENDED SEPTEMBER 30, 1994 AND 1995. Sales for the first six months
of fiscal 1996 increased 25.0% to $46.2 million as compared to sales of $36.9
million for the first six months of fiscal 1995. This increase was
attributable to increased unit sales volumes in the Company's GaAs MMIC,
ceramic and silicon discrete semiconductor product lines, primarily into
commercial wireless markets, which more than offset declining military sales.
Unit sales increases offset flat or declining average selling prices in the
Company's markets.
 
  The increase in sales occurred despite the continued delay in volume
shipments under a $20 million contract to supply ceramic filters entered into
with Motorola in the third quarter of fiscal 1995. Motorola is working with
the Company to resolve a mechanical problem with the filter on a new
manufacturing line at Motorola. Orders received by the Company during the
first six months of fiscal 1996, which do not include any material amount
attributable to the Motorola ceramic filter contract, increased 32.6% compared
with the first six months of fiscal 1995. These new orders consisted primarily
of ceramic filter and resonator orders from other wireless OEMs as well as
orders for GaAs MMICs from wireless OEMs, including Motorola. The Company
accordingly does not expect the delay in the commencement of volume production
under the Motorola ceramic filter contract to have a material effect on its
results of operations.
 
  Gross profit for the first six months of fiscal 1996 increased 38.7% to
$15.3 million or 33.1% of sales, as compared to $11.0 million or 29.8% of
sales, for the comparable period in fiscal 1995. The improvement in gross
profit was attributable primarily to higher capacity utilization at the
Company's Woburn, Massachusetts manufacturing facility.
 
  Research and development expenses increased 117.7% to $3.9 million, or 8.5%
of sales in the first six months of fiscal 1996 as compared to $1.8 million or
4.9% of sales during the first six months of fiscal 1995. This increase was
primarily attributable to increased investment by the Company in the wireless
markets across all of its product lines. The Company will continue to invest
in product and process development in order to address the demands of the
wireless market.
 
  Selling and administrative expenses increased 19.1% to $8.7 million, or
18.9% of sales in the first six months of fiscal 1996, as compared to $7.3
million, or 19.8% of sales for the same period in fiscal 1995. Selling
 
                                      19

<PAGE>
 
and administrative expenses increased primarily as a result of training and
other costs related to the early phases of implementation of a new
manufacturing and management information system, as well as increased
commissions related to higher sales volume.
 
  The Company had a $320,000 repositioning credit during the first half of
fiscal 1996, which resulted from the reversal of certain accruals for
estimated carrying costs as a result of an earlier than expected disposition
of the Methuen, Massachusetts facility.
 
  Other expense increased primarily as a result of interest expense
attributable to higher short term borrowings.
 
  The Company's effective tax rate for the first six months of fiscal 1996 was
15.0% compared to the current combined federal, state and foreign rate of
approximately 40%. This rate differed from statutory rates primarily as a
result of the utilization of net operating loss carryforwards. At September
30, 1995, the Company had available net operating loss carryforwards of
approximately $23 million which expire commencing in 2004.
 
  FISCAL YEARS 1993, 1994 AND 1995. Sales for fiscal 1995 increased 11.6% to
$78.3 million as compared to sales of $70.1 million in fiscal 1994, which in
turn increased slightly over fiscal 1993 sales of $69.5 million. The increase
in fiscal 1995 was attributable to increased unit volumes in the Company's
GaAs MMIC, ceramic and silicon discrete semiconductor product lines, primarily
into commercial wireless markets, which more than offset declining military
sales. Unit increases offset flat or declining average selling prices in the
Company's markets.
 
  Gross profit increased 61.9% in fiscal 1995 to $23.9 million, or 30.5% of
sales, as compared to $14.8 million, or 21.0% of sales in fiscal 1994. Gross
profit decreased 13.9% in fiscal 1994 from $17.1 million, or 24.6% of sales,
in fiscal 1993. The increase in gross profit in fiscal 1995 was the result of
increased sales volumes and greater efficiencies and reduced costs due to the
consolidation of facilities that took place in fiscal 1994 when the Company
moved several product lines to its Woburn, Massachusetts plant. The decrease
in gross profit for fiscal 1994 was the result of steadily deteriorating
margins attributable primarily to the costs of maintaining dedicated resources
in the semiconductor and component businesses for certain military programs,
while revenues for these same programs declined. The facility consolidation
during the fourth quarter of fiscal 1994 also decreased gross profit because
of business interruptions and reengineering costs. Inventory liquidations
resulting from shortened manufacturing cycles also contributed to lower gross
profit during fiscal 1994.
 
  Research and development expenses increased 21.1% in fiscal 1995 to $4.2
million, or 5.3% of sales, from $3.4 million, or 4.9% of sales in fiscal 1994.
Research and development expenses increased 17.6% in fiscal 1994 from $2.9
million, or 4.2% of sales in fiscal 1993. Research and development expenses
have continued to increase as the Company shifts its focus from military
programs to commercial wireless markets.
 
  Selling and administrative expenses decreased to $15.7 million, or 20.1% of
sales, in fiscal 1995 from $16.3 million, or 23.2% of sales in fiscal 1994.
This decrease was primarily attributable to a reduction in administrative
personnel completed during the fourth quarter of fiscal 1994, as a result of
the consolidation of the Company's operations in Methuen, Massachusetts into
its operations in Woburn, Massachusetts. In fiscal 1994 and 1993, selling and
administrative expenses remained relatively constant in absolute dollars and
as a percentage of sales.
 
  Other expense was $648,000 in fiscal 1995, compared to $599,000 in fiscal
1994 and $730,000 in fiscal 1993. In fiscal 1995, a reduction in interest
expense was more than offset by reductions in interest income and other
income, net. The decrease in fiscal 1994 compared to fiscal 1993 was primarily
attributable to higher interest expense in fiscal 1993 relating to a
settlement of prior year tax issues that included a substantial interest
charge.
 
  The provision for income taxes in fiscal 1995, 1994 and 1993 was $502,000,
$270,000 and $200,000, respectively. Although the Company had losses in fiscal
1994 and fiscal 1993, foreign and state income taxes were paid. The Company's
effective tax rate for fiscal 1995 was 15.0%. This rate differed from
statutory rates primarily as a result of the utilization of net operating loss
carryforwards.
 
                                      20

<PAGE>
 
QUARTERLY RESULTS OF OPERATIONS
 
  The Company's quarterly and annual results have in the past varied and may
in the future vary significantly due to a number of factors, including:
cancellation or delay of customer orders; market acceptance of the Company's
or its customers' products; variations in manufacturing yields; timing of
announcement and introduction of new products by the Company and its
competitors; changes in revenue and product mix; competition; changes in
manufacturing capacity and variations in the utilization of this capacity;
variations in average selling prices; variations in operating expenses; the
long sales cycles associated with the Company's customer specific products;
the timing and level of product and process development costs; cyclicality of
the semiconductor and ceramic industries; the timing and level of nonrecurring
engineering revenues and expenses relating to customer specific products; and
changes in inventory levels. Any unfavorable changes in these or other factors
could have a material adverse effect on the Company's operating results.
 
  The following table sets forth unaudited selected consolidated income
statement data for the periods indicated, as well as such data expressed as a
percentage of sales for the same periods. This information has been derived
from unaudited consolidated financial statements which, in the opinion of
management, include all adjustments (consisting only of normal recurring
adjustments) necessary for a fair presentation of such information. The
operating results for any quarter are not necessarily indicative of the
results to be expected for any future period.

<TABLE>
<CAPTION>
                                                     QUARTER ENDED
                          ----------------------------------------------------------------------
                          JUNE 30,  SEPTEMBER 30, DECEMBER 31, MARCH 31, JUNE 30,  SEPTEMBER 30,
                            1994        1994          1994       1995      1995        1995
                          --------  ------------- ------------ --------- --------  -------------
                                  (IN THOUSANDS, EXCEPT PER SHARE AND PERCENTAGE DATA)
<S>                       <C>       <C>           <C>          <C>       <C>       <C>
INCOME STATEMENT DATA:
Sales...................  $18,675      $18,253      $19,359     $21,967  $22,434      $23,733
                          -------      -------      -------     -------  -------      -------
Costs and expenses:
 Cost of sales..........   13,057       12,856       13,494      14,969   15,052       15,836
 Research and
  development...........      919          879          924       1,432    1,787        2,128
 Selling and
  administrative........    3,778        3,559        3,917       4,473    4,429        4,308
 Repositioning
  credit(1).............       -            -            -           -      (320)          -
                          -------      -------      -------     -------  -------      -------
  Total costs and
   expenses.............   17,754       17,294       18,335      20,874   20,948       22,272
                          -------      -------      -------     -------  -------      -------
Operating income........      921          959        1,024       1,093    1,486        1,461
Other income (expense),
 net....................     (178)        (146)        (185)       (139)    (176)        (188)
                          -------      -------      -------     -------  -------      -------
Income before income
 taxes..................      743          813          839         954    1,310        1,273
Provision for income
 taxes..................      140          154           65         143      196          192
                          -------      -------      -------     -------  -------      -------
Net income..............  $   603      $   659      $   774     $   811  $ 1,114      $ 1,081
                          =======      =======      =======     =======  =======      =======
Per share data:
 Net income per share...  $  0.08      $  0.08      $  0.10     $  0.10  $  0.14      $  0.13
                          =======      =======      =======     =======  =======      =======
Weighted average common
 shares and common share
 equivalents............    7,532        7,807        7,815       8,028    8,171        8,208
                          =======      =======      =======     =======  =======      =======
AS A PERCENTAGE OF
 SALES:
Sales...................    100.0%       100.0%       100.0%      100.0%   100.0%       100.0%
                          -------      -------      -------     -------  -------      -------
Costs and expenses:
 Cost of sales..........     69.9         70.4         69.7        68.1     67.1         66.7
 Research and
  development...........      4.9          4.8          4.8         6.5      8.0          9.0
 Selling and
  administrative........    20. 3         19.5         20.2        20.4     19.7         18.1
 Repositioning
  credit(1).............       -            -            -           -      (1.4)          -
                          -------      -------      -------     -------  -------      -------
  Total costs and
   expenses.............     95.1         94.7         94.7        95.0     93.4         93.8
                          -------      -------      -------     -------  -------      -------
Operating income........      4.9          5.3          5.3         5.0      6.6          6.2
Other income (expense),
 net....................     (0.9)        (0.8)        (1.0)       (0.7)    (0.8)        (0.8)
                          -------      -------      -------     -------  -------      -------
Income before income
 taxes..................      4.0          4.5          4.3         4.3      5.8          5.4
Provision for income
 taxes..................      0.8          0.9          0.3         0.6      0.8          0.8
                          -------      -------      -------     -------  -------      -------
Net income..............      3.2%         3.6%         4.0%        3.7%     5.0%         4.6%
                          =======      =======      =======     =======  =======      =======
</TABLE>

- --------
(1) In the quarter ended June 30, 1995, the Company recorded a $320,000
    repositioning credit, attributable to the reversal of certain accruals for
    estimated carrying costs, as a result of an earlier than expected
    disposition of the Methuen, Massachusetts facility.
 
                                      21

<PAGE>
 
FINANCIAL CONDITION
 
  At September 30, 1995, working capital totaled $11.1 million and included
$2.1 million in cash and cash equivalents, compared with $11.0 million at the
end of fiscal 1995. In July, 1995, the Company sold its Methuen, Massachusetts
plant and received net proceeds of $2.5 million. In connection with the sale,
using the net proceeds and $1 million borrowed under its line of credit, the
Company retired $3.5 million of related debt. During the first six months of
fiscal 1996, cash generated from the Company's operations combined with
additional borrowings under its line of credit were used to support increases
in accounts receivables and inventories and capital additions resulting from
the growth in new business. These capital additions included semiconductor and
ceramic manufacturing equipment, as well as various information technology
equipment, purchased for an aggregate of $3.9 million. With the increased
demand for its wireless products, the Company expects to increase its
investment in production facilities and equipment by approximately $12 million
in the next 12 months.
 
  In September 1995, the Company entered into a $6.5 million working capital
line of credit agreement which expires on August 1, 1997, of which
approximately $1.1 million was available at October 25, 1995, and a $5.0
million equipment line of credit which expires on July 31, 1996, of which
approximately $4.0 million was available at October 25, 1995. Advances under
these lines of credit bear interest at the prime rate or, at the Company's
option, the LIBOR rate plus 200 basis points. The Company is also seeking
approval from the State of Maryland for an additional $3 million of grant
funding to finance the planned expansion of its ceramic manufacturing
facility. Other sources of financing have also been or are being pursued, such
as increasing the amount of the line of credit, receiving additional grant
funding and capital financing through leases.
 
  The Company believes that its available lines of credit, together with cash
generated from operations and the net proceeds of this offering, will be
adequate to fund its operations and expected capital expenditures for at least
the next eighteen months.
 
                                      22

<PAGE>
 
 
                                  BUSINESS
 
INTRODUCTION
 
  The Company designs and manufactures a broad range of RF, microwave
frequency and millimeter wave frequency MMICs, ceramic products, discrete
semiconductors, and microwave and millimeter wave components and subsystems
for wireless communications applications. These applications include cellular
telephones, worldwide PCS/PCN, pagers, specialized mobile radio, wireless data
services and GPS. The Company utilizes proprietary GaAs, ceramic and silicon
process technologies to address the needs of wireless communications OEMs for
smaller, less expensive and more power efficient products.
 
  The Company gained extensive experience in the design and manufacture of
GaAs MMIC's, discrete semiconductors, ceramic products and components and
subsystems for millimeter wave frequencies in military applications. Over the
past several years, the Company has refocused this knowledge and experience on
the wireless communications commercial markets. As a result, the Company
believes that it is well-positioned as higher frequencies are increasingly
used in emerging wireless technologies such as PCS/PCN infrastructure
equipment, wireless cable TV and automotive collision avoidance systems.
 
  The Company currently focuses its sales and marketing efforts on the major
OEMs in the wireless communications industry, such as Motorola, Nokia,
Ericsson and AT&T, and their suppliers, with the objective of securing orders
for high volume, application specific products. With available capacity at its
GaAs fabrication facility, the Company believes that large volume product
orders offer opportunities for economies of scale and improved margins. By
maintaining close relationships with customers and by integrating its design
and manufacturing capabilities, the Company can better anticipate its
customers' needs and rapidly develop customer specific solutions based upon
the Company's core technologies. The Company believes that this approach
enhances the likelihood that the Company's products will be included in its
customers' designs for new wireless communications products.
 
INDUSTRY OVERVIEW
 
  The wireless communications industry has grown significantly during the past
decade and worldwide demand for wireless communications services and related
products and infrastructure continues to grow. This growth has been
attributable to lower costs to the consumer and improvements in the quality
and performance of many wireless technology products, including cellular
telephones and associated infrastructure, worldwide PCS/PCN, pagers,
specialized mobile radio, DBS TV and wireless data services. The industry has
responded to an increased desire for mobility and untethered access to
information in personal and business communications by making these products
smaller, less expensive and with improved battery life. Additionally, wireless
communications applications are growing in less developed countries because
they offer the advantages of a modern telephone and cable TV system without
the costly and time consuming development of an extensive wired
infrastructure. Finally, new and emerging applications of wireless technology,
such as GPS, wireless cable TV, RF identification tags, wireless local area
networks ("wireless LANs") and automotive collision avoidance systems are
increasing the size and scope of wireless communications markets.
 
  A typical cellular communications system comprises a geographic region
containing a number of cell sites, sometimes referred to as "base stations."
These base stations transmit and receive signals from mobile or handheld units
and, after processing, connect the signals to the local PBX switching office
of the wireline telephone system. Digital radios with a millimeter wave
carrier frequency increasingly are being used to network base stations to the
PBX switching office. To offer better performance and accommodate increased
communication traffic, cellular service providers are increasing the number of
cell sites and attempting to reduce the cost of the infrastructure. At PCS/PCN
frequencies, the infrastructure is being developed with substantially more and
smaller cell sites than cellular telephone systems.
 
                                      23

<PAGE>
 
  The rapid growth in the demand for wireless communications has led to
increased communication traffic and congestion of the historically assigned
frequency bands. At the same time, as new wireless communications technologies
proliferate, users of wireless services want to send ever increasing amounts
of data at ever greater transmission rates over wireless networks. These
communications require greater bandwidth, which is primarily available at
higher frequencies. For example, while cellular telephones operate at
frequencies of 800 to 960 Mhz, handsets used in emerging worldwide PCS/PCN
services operate at frequencies above 1.8 Ghz. The migration to higher
frequency bands requires significant investment in wireless infrastructure. In
addition, digital radio transceivers, utilizing millimeter-wave frequencies,
are increasingly being used in place of land lines as a more economical means
to link base stations in a cellular telephone or PCS/PCN system to the central
switching office.
 
  The Company believes that the new and emerging applications of wireless
technology will operate at even higher frequencies. The chart below identifies
some of the wireless applications according to the relative frequencies
currently assigned to them.
 
                           [BAR CHART APPEARS HERE]
 
  As the wireless communications industry has grown, competition among
wireless OEMs has become increasingly intense. Consumers are demanding
products that are smaller, less expensive and provide longer battery life, and
demanding continual improvements, leading to shorter product design and
manufacturing cycles. The Company believes that similar trends will
characterize emerging wireless technology applications such as GPS, wireless
cable TV, RF identification tags, wireless LAN and automotive collision
avoidance systems.
 
                                      24

<PAGE>
 
  GaAs and ceramic technologies have emerged as effective means to accommodate
these higher frequency applications. GaAs technology for MMICs is an effective
alternative or complement to silicon solutions for many wireless applications
at higher frequencies. GaAs has inherent physical properties that allow its
electrons to move up to five times faster than those of silicon. Also, the
GaAs substrate is semi-insulating whereas silicon is conductive. The higher
electron mobility provides for improved electrical performance at higher
frequencies versus silicon and also results in improved power efficiency and
consequently longer battery life. The semi-insulating properties of GaAs
permit integration in a single device of numerous functions which currently
cannot be realized effectively in silicon-based MMICs, thereby permitting
further miniaturization with GaAs.
 
  Ceramic material is an electrically passive medium that may be used for low
loss RF components. Certain ceramic materials exhibit high dielectric
constants which allow more compaction by reducing the electrical wavelengths
within the material enabling miniaturization. Filter technology is
increasingly important as handsets are developed to operate within narrower
bands of the frequency spectrum. Wireless handset manufacturers use ceramic
filters to reduce out-of-band noise. Dielectric resonator filters, dielectric
resonators, ferrites and coaxial resonators, such as those manufactured by the
Company, are used in cellular and PCS/PCN handset and infrastructure equipment
for a variety of filtering and other purposes.
 
THE ALPHA STRATEGY
 
  The Company's objective is to be a leading supplier of a broad and
complementary selection of GaAs RF, microwave and millimeter wave MMICs,
ceramic products, silicon discrete semiconductors, and microwave and
millimeter wave components and subsystems used in both infrastructure and
handheld equipment for the wireless communications industry. Key elements of
the Company's strategy are:
 
  .  Leverage Process Technologies in GaAs, Ceramic and Silicon. The Company
     uses its extensive experience in vertically integrated process
     technologies for GaAs MMICs, ceramic products and silicon discrete
     semiconductors to capitalize on the demand in the wireless
     communications markets for smaller and more power efficient products.
     The Company addresses smaller size and power efficiency by integrating
     more discrete components and functions onto its GaAs MMICs. It utilizes
     high dielectric ceramic materials to reduce size and improve
     performance. For example, the Company's ceramic products are widely used
     in cellular base stations due to their size and performance. In
     addition, its GaAs MMICs are well suited for amplification, switching
     and control functions in wireless handsets where power, size and
     efficiency are important considerations.
 
  .  Offer a Broad Array of Products Across the Frequency Spectrum. The
     Company offers a broad array of products in GaAs, ceramic and silicon
     that address a wide portion of the wireless communications frequency
     spectrum, including RF, microwave and millimeter wave. This enables the
     Company to offer an increasing portion of the "footprint" in wireless
     communications handheld and infrastructure equipment. Wireless OEMs
     therefore have the opportunity to satisfy an increasing percentage of
     their component needs from the Company.
 
    The Company gained extensive experience in the design and manufacture of
    millimeter wave MMICs and ceramic products in prior years as a military
    subcontractor. As a result, the Company believes that it is currently
    well-positioned in the commercial industry as higher frequencies are
    increasingly used in emerging applications of wireless technologies,
    such as PCS/PCN infrastructure equipment, wireless cable TV and
    automotive collision avoidance systems. Furthermore, the Company's
    experience with millimeter wave technologies and processes has enhanced
    its ability to offer microwave frequency products which demand less
    rigorous design and manufacturing processes than those required for the
    higher frequency millimeter wave products.
 
  .  Become a High Volume, Low Cost Manufacturer. The Company believes that
     large volume product orders offer opportunities for economies of scale
     and improved margins. The Company currently utilizes its internal wafer
     fabrication facilities in Woburn, Massachusetts and one external foundry
     to satisfy its GaAs MMIC processing requirements. As the Company
     develops new GaAs products and
 
                                      25

<PAGE>
 
     demand increases, it will continue to migrate manufacturing to its
     internal fabrication facilities, where capacity currently exists, in
     order to reduce costs and improve operating margins. However, the
     Company will continue to use external fabrication facilities when dual
     sourcing is advantageous or when outsourced capacity is needed for
     established product designs.
 
    In ceramics, the Company attempts to assure consistency, reproducibility
    and low costs through a vertically integrated manufacturing process,
    from formulating and blending raw materials, through forming, firing and
    finishing the final products. By controlling the critical processes and
    tightly coupling the materials process with design and fabrication, the
    Company is able to offer ceramic products which enhance the electrical
    performance of the customers' circuit design.
 
    The Company has invested in design automation and has developed high
    volume testing systems and production processes to maintain high
    manufacturing yields. The Company pursues continuous improvements in all
    phases of its operations, and its Woburn, Massachusetts facility is ISO
    9001 certified.
 
  .  Supply Worldwide Industry Leaders; Respond to Need for Rapid Design
     Cycle Times. The Company focuses its sales and marketing efforts on the
     dominant OEMs and their principal suppliers in the wireless
     communications industry to secure orders for high volume, application
     specific products. These OEMs currently include Motorola, Nokia,
     Ericsson and AT&T. The Company continues to develop close relationships
     with its customers. By remaining in close contact with design
     engineering, manufacturing, purchasing and project management of its
     customers, the Company can better anticipate its customers' needs,
     rapidly develop customer specific solutions based upon the Company's
     core technologies and successfully design the Company's solutions into
     the customers' final products. The Company also strives to capitalize on
     its design experience, process technology and efficient wafer
     fabrication and ceramic production capabilities to quickly develop
     prototypes that can be ready for testing, demonstrating rapid design
     cycle time.
 
PRODUCTS AND MARKETS
 
  The Company has one of the wireless communications industry's broadest
selections of RF front-end products serving a number of functions and a wide
range of applications, including cellular and PCS/PCN handsets, base stations
and digital radio links, pagers, specialized mobile radio, wireless data
services, GPS, DBS TV, wireless cable TV, RF identification tags and
automotive collision avoidance systems.
 
  The Company's products serve the following functions:
 
    Amplification. Wireless communications systems require signal
  amplification in both the receive and transmit sections of the system. Of
  critical importance in the receive function is the ability to amplify the
  relatively weak incoming signal without adding background noise. GaAs MMIC
  amplifiers contribute less noise than silicon amplifiers at frequencies
  above 1 GHz. This advantage becomes even greater at higher frequencies. The
  transmit and receive functions must use power efficiently because battery
  life is a critical system feature in portable applications. GaAs products
  can operate at lower supply voltages and provide superior power efficiency
  when compared to silicon components.
 
    Switching and Control. Wireless communications equipment must route or
  adjust signal levels efficiently between the receiver and transmitter and
  other processing devices. This routing is typically accomplished with high
  speed switching components. As signals pass through these switches, the
  quality and strength of the signal can be degraded, resulting in a loss of
  signal power. The semi-insulating properties of GaAs MMIC structures used
  by the Company provide lower insertion loss and improved isolation in
  comparison to comparable silicon products and therefore generally provide a
  better vehicle for integrated switching functions.
 
    Frequency Conversion. After an incoming signal is received, it is
  converted to a lower frequency for easier processing. Processed signals are
  also converted to higher frequencies before being transmitted. These "down
  conversion" and "up conversion" functions provide opportunities for GaAs
  MMIC solutions,
 
                                      26

<PAGE>
 
  particularly at higher frequencies. GaAs MMICs reduce signal interference
  and have power gain through these conversions.
 
    Filtering. Filtering is used to prevent unwanted frequencies from
  interfering with the frequencies which are carrying the relevant
  information. Wireless communications systems often have transmitters which
  operate at slightly different frequencies than the receivers and these
  signals must be kept separate. Wireless antennas can also pick up ambient
  background signals which must be filtered out from the receiver path. The
  Company's high performance dielectric and coaxial resonator filters perform
  these functions in both base stations and handsets.
 
    Oscillation. Oscillators are used to generate the radio frequencies which
  are used in wireless communications. They are part of the frequency
  conversion function which uses "up conversion" to convert voice and data
  information up to radio frequencies for transmission and "down conversion"
  to convert them back down for digital signal processing in the receivers.
  The Company's ceramic coaxial resonators and discrete semiconductors are
  used to accurately define and control the frequency of oscillation.
 
  These functions, along with all of the functions in a typical cellular
handset, are identified in the diagram below.
 
        [ART OF TYPICAL WIRELESS COMMUNICATIONS HANDSETS APPEARS HERE]
 
 
                                       27

<PAGE>
 
  The Company categorizes its product lines and core technologies as follows:
 
                    .  RF, Microwave and Millimeter Wave MMICs
                    .  Ceramic Products
                    .  Discrete Semiconductors
                    .  Millimeter Wave Components and Subsystems
 
  The chart below identifies the major markets currently served by each of the
Company's product lines. In addition, the Company's products serve other
wireless markets.
 






                                    [CHART]







- --------
(1) These applications do not utilize millimeter wave components and
subsystems.
 
  RF, Microwave and Millimeter Wave MMICs. The Company designs and
manufactures RF, microwave and millimeter wave MMICs in GaAs that integrate
numerous functions performed by discrete semiconductors. The functions of the
Company's GaAs MMICs include amplification, switching and control and
frequency conversion of signals in the radio transceiver portion of wireless
communications systems. In wireless voice and data applications, the Company's
GaAs MMICs are used in the handheld unit, base station transceivers and point
to point radio links between the base station and local wireline network. The
Company's millimeter wave MMICs connect transmissions between base stations,
including the local wireline PBX switching office. The Company believes that
this function is growing in importance, and that it will continue to do so as
a greater percentage of the higher frequency spectrum is allocated to
accommodate the increase in wireless communications traffic.
 
  Ceramic Products. The Company's ceramic products play a critical role in the
signal selection, or filtering process, that is essential to processing
communications signals. The physical properties of ceramic materials are
suitable for power efficiency and miniaturization. The Company is a major
supplier of miniature ceramic antennas to manufacturers of GPS receivers,
particularly for compact handheld units which are gaining popularity. Ceramic
products are crucial in the frequency-determining portions of DBS TV
receivers, radar detectors and intrusion alarms. They are also shrinking the
size of cellular radio base station equipment.
 
  Discrete Semiconductors. The Company fabricates discrete surface mount
semiconductors in both GaAs and silicon as stand alone components for
specialized applications which are not addressed efficiently by MMICs. Silicon
technology continues to be used for discrete semiconductors when circuit
integration is not possible or for certain applications for which the
properties of silicon material provide better performance. Discrete
semiconductors are used for amplification, switching and control and frequency
conversion in base stations, transmitters and receivers of cellular handsets.
 
                                      28

<PAGE>
 
  Millimeter Wave Components and Subsystems. Millimeter wave applications
operate above the microwave frequency range, primarily between 20 Ghz and 300
Ghz. The Company has been an industry leader in the design and manufacture of
millimeter wave components and subsystems for military and defense related
applications. This experience established the Company's advanced millimeter
wave MMIC capability. It also provides the Company with technological and cost
advantages in commercial applications, such as PCS/PCN and cellular telephone
infrastructure equipment. The Company manufactures MMIC based amplifiers,
transmitters and receivers, as well as single function components such as Gunn
oscillators, mixers, isolators and circulators for commercial applications,
including PCS/PCN radio equipment, and in emerging markets for intelligent
automobile cruise control and collision avoidance systems.
 
CUSTOMERS
 
  The Company's customers include leading OEMs and their principal suppliers
in the wireless communications industry. During the first six months of fiscal
1996, approximately 81% of the Company's new orders were from OEMs and their
suppliers for commercial products, and the remaining 19% of new orders were
for use in a wide variety of military and defense related systems. The Company
anticipates that the percentage of the Company's sales attributable to
military and defense related systems will continue to decline for the
foreseeable future. See "Management's Discussion and Analysis of Financial
Condition and Results of Operations." During such period, the Company's direct
sales to Motorola, Ericsson, Nokia and AT&T, in the aggregate, accounted for
approximately 18% of the Company's sales. The Company's direct sales to six
other customers, believed by the Company to be among the suppliers to these
four OEMs, accounted for an additional 8% of the Company's sales during such
period. For the first six months of fiscal 1996, direct sales to Motorola,
excluding sales to its suppliers, accounted for approximately 9.8% of the
Company's sales. Direct sales to no one customer accounted for in excess of
10% of the Company's sales during fiscal 1995 or the first six months of
fiscal 1996.
 
  One of the Company's major stockholders, which owns approximately 20% of the
Company's outstanding Common Stock (prior to giving effect to the offering
contemplated hereby), is a significant customer of the Company, accounting for
approximately 3.7% of the Company's sales for the first six months of fiscal
1996. The Company believes that all transactions with this stockholder have
been negotiated at arms-length and have been on terms and conditions no less
favorable to the Company than the Company could obtain in transactions with
independent third parties.
 
SALES AND MARKETING
 
  The Company sells its products through independent manufacturers'
representatives and through a direct sales staff. The Company currently has 14
domestic and 21 international independent manufacturers' representative
organizations. The Company's 26 person direct sales and marketing staff
manages the manufacturers' representatives on a regional basis and provides
sales direction and support to the manufacturers' representatives. The direct
sales staff also manages key customer accounts and worldwide customer support.
 
  The Company believes that the technical and complex nature of its products
and markets demands an extraordinary commitment to close ongoing relationships
with its customers. The Company strives to remain in close contact with its
customers' design, engineering, manufacturing, purchasing and project
management. The Company employs a team approach in developing such
relationships, combining the support of design and applications engineers,
manufacturing personnel, sales and marketing staff and senior management. The
Company's objective in developing such relationships is to become an extension
of the customer's design department. With a more comprehensive understanding
of its customers' requirements for current products and plans for future
applications, the Company believes it enhances its opportunities for design
wins.
 
 
                                      29

<PAGE>
 
COMPETITION
 
  The Company competes on the basis of price, performance, quality,
reliability, size, ability to meet delivery requirements and customer service
and support. The Company experiences intense competition worldwide from a
number of multinational companies that offer a variety of competitive products
and broader product lines, and which have substantially greater financial
resources and production, marketing, manufacturing, engineering and other
capabilities than the Company. The Company also faces competition from a
number of smaller companies. In addition, the Company's customers,
particularly its largest customers, may have or could acquire the capability
to develop or manufacture products competitive with those that have been or
may be developed or manufactured by the Company. The Company's future
operating results may depend in part upon the extent to which these customers
elect to purchase from outside sources rather than develop and manufacture
their own systems. There can be no assurance that such customers will rely on
or expand their reliance on the Company as an external source of supply. See
"Risk Factors--Competition."
 
  The production of GaAs MMICs is, and the Company believes will continue to
be, more costly than the production of silicon devices. As a result, the
Company must offer devices which provide superior performance to that of
silicon for specific applications in order to be competitive with silicon
devices. There can be no assurance that the Company's GaAs MMICs will be able
to provide such superior performance.
 
  The Company expects its competitors to continue to improve the performance
and lower the price of their current products and to introduce new products or
new technologies with enhanced functionality and new features. The Company
expects to continue to experience significant price competition that may
adversely affect its gross margins and its operating results. The Company
believes that to remain competitive, it will continue to be required to expend
significant resources on, among other things, new product development and
enhancements, as well as manufacturing efficiencies to reduce costs. There can
be no assurance that the Company will be able to compete successfully in the
future.
 
MANUFACTURING
 
  The Company has extensive expertise in manufacturing process technologies
for GaAs MMICs, discrete silicon semiconductors and ceramic products. The
Company's manufacturing operations are vertically integrated and the Company
attempts to control all critical steps in the manufacturing process in order
to shorten product design and manufacturing cycles, improve product quality
and reliability and reduce costs. In its Woburn, Massachusetts facility, the
Company designs, fabricates, tests and assembles GaAs MMICs, discrete silicon
semiconductors and components and subsystems. The Company's ceramic
manufacturing facility controls formulation, powder preparation, forming,
firing and finishing, as well as value-added assembly of its products. The
Company seeks to implement statistical process control and similar methods
throughout its operations as a means to monitor and improve product quality.
Many of the Company's manufacturing process technologies are proprietary.
 
  The Company's Woburn, Massachusetts design and manufacturing processes were
certified as ISO 9001 compliant in 1994. In addition, the Company has
successfully passed intensive audits by its major customers, Motorola, Nokia,
Ericsson and AT&T. The Company emphasizes intensive personnel training and
management support. Employees participate in 50 or more hours of classroom
training each year.
 
  The Company has in-house assembly capabilities but also uses several
subcontractors in Asia to package and wirebond very large volume orders of
integrated circuits. Although it is the Company's policy to have at least two
assembly houses located in different countries for each assembly process, at
times the Company is unable to achieve this goal because of minimum volume
requirements, service quality issues or other factors. After assembly, the
packaged products are returned to the Company for final testing in the
Company's automated production test facilities. The Company monitors the
processes of each subcontractor, reviewing the subcontractor's quality system,
production process, statistical and reliability program on an ongoing basis.
The Company's policy is to utilize, whenever possible, ISO 9001 certified and
Semiconductor Assembly Counsel
 
                                      30

<PAGE>
 
("SAC") certified subcontractors or those subcontractors who are currently
pursuing SAC registration. A reduction or interruption in the performance of
assembly services by subcontractors or a significant increase in the price
charged for such services by subcontractors could adversely affect the
Company's operating results. See "Risk Factors--Dependence on Assembly
Contractors."
 
  The fabrication of GaAs MMICs and semiconductor products is highly complex
and sensitive to dust and other contaminants, requiring production in a highly
controlled, clean environment. Minute impurities, difficulties in the
fabrication process or defects in the masks used to print circuits on the
wafer can cause a substantial percentage of the wafers to be rejected or
numerous die on each wafer to be nonfunctional. The less mature stage of GaAs
technology relative to silicon leads to somewhat greater difficulty in
controlling parametric variations, thereby yielding fewer good die per wafer.
In addition, the more brittle nature of GaAs wafers can result in higher
processing losses. To maximize wafer yield and quality, the Company tests its
products at various stages in the fabrication process, maintains continuous
reliability monitoring and conducts numerous quality control inspections
throughout the entire production flow using analytical manufacturing controls.
See "Risk Factors--Manufacturing Risks: Product Quality, Performance and
Reliability."
 
  The Company's operation of its own wafer fabrication facility entails a high
degree of fixed costs. Such fixed costs consist primarily of occupancy costs
for the manufacturing facilities, investments in manufacturing equipment,
repair, maintenance and depreciation costs related to such equipment and fixed
labor costs related to manufacturing and design and process engineering.
 
  The raw materials and equipment used in the production of the Company's
products are available from several suppliers and the Company is not dependent
upon any sole source of supply. However, the Company does procure certain
materials, components and services for its products from single or limited
sources. Although, on occasion, shortages have occurred and lead times have
been extended, the Company has not experienced any material difficulties in
obtaining raw materials or equipment. A supplier's variation in raw materials
could have a material adverse effect on the Company's business. If the Company
were to change suppliers, the Company would have to requalify the components
of such suppliers, causing potential delays. Also, prices could increase in
connection with changes in suppliers. See "Risk Factors--Limited Sources of
Materials and Services."
 
RESEARCH AND DEVELOPMENT
 
  The Company's research and development efforts are focused on the
development of new products based upon its core technologies that will be
marketed and sold through the Company's existing sales channels. The Company
is seeking to improve existing product performance, reduce costs, and improve
design and manufacturing processes. The Company's research and development is
focused on creating application specific designs that fully incorporate its
customers' system design goals, and on providing rapid design-cycle time,
well-defined design rules and highly repeatable, stable processes. In
developing new products, the Company utilizes a product platform concept, in
which new products are based on the fundamental architectures of existing
products.
 
  The Company developed much of its millimeter wave technology in connection
with approximately 25 years of military and defense related contracts
involving sophisticated millimeter wave semiconductor and ceramic products.
The Company is using the techniques, processes and experience in millimeter
wave technology developed in connection with these government programs for
current and emerging commercial applications. In furtherance of the Company's
research and development program, the Company will pursue and accept only
those government, military and defense-related contracts that advance the
Company's core technology for commercial applications in the wireless
communications industry or offer high profit margin potential with low risk.
 
  The Company's research and development expenditures, including both Company-
sponsored and customer-sponsored research and development, for fiscal 1993,
1994 and 1995 and the first six months of fiscal 1996, were $14.6 million,
$13.8 million, $12.4 million and $6.8 million, respectively. See "Management's
Discussion and Analysis of Financial Condition and Results of Operations."
 
                                      31

<PAGE>
 
  The wireless communications market is subject to rapid technological change,
frequent new product introductions and enhancements, product obsolescence,
changes in end-user requirements and evolving industry standards. The
Company's ability to be competitive in this market will depend in significant
part upon its ability to successfully develop, introduce and sell new products
on a timely and cost effective basis that respond to changing customer
requirements. See "Risk Factors--Product and Process Development and
Technological Change."
 
GOVERNMENT REGULATIONS
 
  Wireless communications are subject to extensive regulation by the laws of
the United States and other countries and international treaties. The
Company's products are incorporated into OEM final products which must conform
to a variety of domestic and international requirements established, among
other things, to avoid interference among users of wireless devices and to
permit interconnection of equipment. Every country has a different regulatory
process. Regulatory bodies worldwide are continuing the process of adopting
new standards for wireless communication products. The delays inherent in this
governmental approval process may cause the cancellation, postponement or
rescheduling of the installation of wireless communications systems
incorporating the Company's products by its customers, which in turn may have
a material adverse effect on the sale of products by the Company to such
customers. The Company is also affected to the extent that domestic and
international authorities regulate the allocation of the radio frequency
spectrum and impose technical standards. Equipment to support new services can
be marketed only if permitted by suitable frequency allocations and
regulations, and the process of establishing new regulations is complex and
lengthy. Failure by the regulatory authorities to allocate suitable frequency
spectrum could delay the expansion of the market potential for the Company's
products.
 
  The regulatory environment in which the Company operates is subject to
change. Regulatory changes, which are affected by political, economic and
technical factors, could significantly impact the Company's operations by
restricting development efforts by the Company's customers, making current
systems obsolete, expanding market opportunities for the Company's
competitors, or otherwise increasing the opportunity for additional
competition. Any such regulatory changes, including changes in the allocation
of available spectrum, could have an effect on the Company's business and
operating results, which effect could be material and adverse. See "Risk
Factors--Government Regulation of Communications Industry."
 
INTELLECTUAL PROPERTY
 
  The Company believes that the success of its business will depend more on
the technical competence, creativity and manufacturing and marketing abilities
of its employees than on patents, trademarks and other intellectual property
rights. The Company's objective is to foster continuing technological
innovation to maintain and protect its competitive position. Nevertheless, the
Company has a policy of seeking patents when appropriate on inventions
resulting from its ongoing research and development and manufacturing
activities.
 
  The Company relies primarily on trade secret laws, confidentiality
procedures and licensing arrangements to protect its intellectual property
rights. The Company enters into confidentiality and nondisclosure agreements
with its service providers, customers, employees and others, and attempts to
limit access to and distribution of its proprietary information. However,
there can be no assurance that such measures will adequately protect the
Company's trade secrets or other proprietary information, that disputes with
respect to the ownership of its intellectual property rights will not arise,
that the Company's trade secrets or proprietary technology will not otherwise
become known or be independently developed by competitors or that the Company
can otherwise meaningfully protect its intellectual property rights. See "Risk
Factors--Difficulty in Protecting Intellectual Property."
 
  Although there are no pending lawsuits against the Company regarding
infringement of any existing patents or other intellectual property rights,
the Company from time to time is notified of claims that the Company may be
infringing patent, trademark, mask work, copyright or other proprietary rights
of third parties. Furthermore,
 
                                      32

<PAGE>
 
there can be no assurance that such infringement claims will not be asserted
by third parties in the future with respect to the Company's products or that
the Company's products will not infringe patent, trademark, mask work,
copyright or other proprietary rights of third parties. The Company may seek
to obtain licenses from third parties under such rights or may attempt to
develop non-infringing technology. There can be no assurance that the Company
will obtain any such licenses upon acceptable terms or that the Company would
be successful in developing such non-infringing technology. The Company's
involvement in any patent dispute or other intellectual property dispute or
action to protect trade secrets and know how could have a material adverse
effect on the Company's business. Adverse determinations in any litigation
could subject the Company to significant liability to third parties, require
the Company to seek licenses from third parties and prevent the Company from
manufacturing and selling its products. Any of these situations could have a
material adverse effect on the Company's business. See "Risk Factors--
Intellectual Property Claims."
 
EMPLOYEES
 
  As of September 30, 1995, the Company had approximately 930 employees,
including 630 in manufacturing, 160 in engineering, research and development,
65 in marketing and sales, and 75 in administration and finance. None of the
Company's employees is represented by a collective bargaining agreement, nor
has the Company experienced any work stoppage. The Company considers its
relations with its employees to be good.
 
FACILITIES
 
  The Company's corporate headquarters and its MMIC, discrete semiconductor,
and components and subsystems operations occupy a 158,000 square foot facility
owned by the Company in Woburn, Massachusetts. At the Woburn facility,
approximately 108,000 square feet are devoted to design, development and
manufacture of MMICs, discrete semiconductors, and components and subsystems.
The Woburn facility includes a 6,000 square foot class 100 clean room (no more
than 100 particles larger than 0.5 microns in size per cubic foot of air), a
6,000 square foot class 10,000 clean room (no more than 10,000 particles
larger than 0.5 microns in size per cubic foot of air) and a 6,000 square foot
class 100,000 clean room (no more than 100,000 particles larger than 0.5
microns in size per cubic foot of air).
 
  The Company owns a 92,000 square foot facility in Adamstown, Maryland which
is the Company's primary ceramic products manufacturing facility. In addition,
the Company leases an approximate 33,000 square foot facility in Frederick,
Maryland to provide additional manufacturing capacity for dielectric resonator
filters. This lease expires in August 1997. The Company also leases a 7,200
square foot facility in Marly, France, which lease expires in 2008, and rents
a 3,600 square foot facility in Milpitas, California on a month-to-month
basis. The facilities in France and California are also utilized in the
Company's ceramic products manufacturing operations.
 
  The Company is currently operating slightly more than one shift at the
Woburn, Massachusetts facility, and intends to add a full second shift before
the end of 1995. The equipment is generally utilized in the facility at
approximately 40% of capacity based on an assumed three shift, five day per
week operation. The Company intends to use a portion of the proceeds of this
offering to acquire additional MMIC production equipment and to upgrade its
wafer fabrication facilities in order to increase production capacity. With
this additional manufacturing equipment, the Company believes that this
facility will meet production capacity requirements over the next two to three
years. The Company also believes that available capacity at its Woburn
facility provides it with significant opportunities to improve operating
margins by adding additional shifts, without significantly increasing
manufacturing fixed costs, as sales volumes increase. See "The Alpha
Strategy." The Company believes additional manufacturing capacity is needed to
meet current demand for ceramic products and intends to use a portion of the
net proceeds of this offering to expand its ceramic manufacturing capacity in
Maryland. See "Use of Proceeds."
 
                                      33

<PAGE>
 
                                  MANAGEMENT
 
DIRECTORS AND EXECUTIVE OFFICERS
 
  The directors and executive officers of the Company are as follows:
 

<TABLE>
<CAPTION>
   NAME                      AGE POSITION
   ----                      --- --------
   <S>                       <C> <C>
   George S. Kariotis.......  72 Chairman of the Board of Directors
   Martin J. Reid...........  54 Director, President and Chief Executive Officer
   David J. Aldrich.........  38 Vice President, Chief Financial Officer and
                                 Treasurer
   P. Daniel Gallagher......  51 Vice President
   Thomas C. Leonard........  61 Vice President
   Joseph J. Alberici.......  39 Vice President, President and Chief Executive
                                 Officer of Trans-Tech, Inc.
   Paul E. Vincent..........  48 Controller
   Arthur Pappas............  59 Director
   Raymond Shamie...........  74 Director
   Sidney Topol.............  70 Director
   Charles A. Zraket........  71 Director
</TABLE>

 
  The Company's Restated Certificate of Incorporation and Amended and Restated
By-Laws provide for the division of the Board of Directors into three classes,
each having a staggered three-year term of office. The term of one class
expires each year. At each annual meeting of the stockholders following the
initial classification, the directors elected to succeed those directors whose
term expire are designated as being the same class as the directors they
succeed and are elected to hold office until the third succeeding annual
meeting. Directors may be removed only for cause at a stockholders' meeting
upon the vote of stockholders holding a majority of the Company's Common
Stock, or upon the vote of a majority of the directors then in office.
 
  George S. Kariotis was Chairman of the Board and Chief Executive Officer
from 1962 when the Company was founded until 1978, and, from 1974 to 1978, he
was also Treasurer of the Company. From 1979 to 1983, Mr. Kariotis was the
Secretary of Manpower Development and Economic Affairs for the Commonwealth of
Massachusetts. He was re-elected Chairman of the Board of the Company in 1983
and Chief Executive Officer in 1985. Mr. Kariotis resigned as Chief Executive
Officer in July 1986 while he campaigned for public office. He resumed his
position as Chief Executive Officer in November 1986, and served in that
capacity until 1991.
 
  Martin J. Reid was a Vice President of the Company from 1975 to 1981, and
from 1981 to 1985, he was a Senior Vice President of the Company. Mr. Reid was
elected President, Chief Operating Officer and became a Director in 1985. He
was elected acting Chief Executive Officer in July 1986 while Mr. Kariotis
campaigned for public office, and relinquished that position and resumed his
position as Chief Operating Officer in November 1986 after Mr. Kariotis'
campaign. Mr. Reid was elected to the position of Chief Executive Officer in
1991.
 
  David J. Aldrich joined the Company in 1995 as Vice President, Chief
Financial Officer and Treasurer. From 1989 to 1995, Mr. Aldrich held several
positions at M/A-COM, Inc., including Manager Integrated Circuits Active
Products, Corporate Vice President Strategic Planning, Director of Finance and
Administration, and Director of Strategic Initiatives with the
Microelectronics Division. Prior to joining M/A-COM, Inc., Mr. Aldrich was
Controller with Adams Russell Electronics Company from 1984 to 1989 and a
project leader for a NASA satellite communications program with Space
Communications Company (a Fairchild Industries and Contel Inc. Partnership)
from 1981 to 1983. Mr. Aldrich is a director of CableMaxx, Inc., a wireless
cable television service provider.
 
                                      34

<PAGE>
 
  P. Daniel Gallagher joined the Company in 1989 as Director of Device
Operations of the Company's Devices Group, and was elected Vice President in
1990. Previously, he held a series of engineering and marketing positions at
M/A-COM, Inc., beginning with his initial assignment as a semiconductor
engineer in 1968. He was appointed a Vice President of Marketing of M/A-COM,
Inc. in 1980, and in his last assignment he was the Vice President-General
Manager of the M/A-COM, Inc. Lowell Semiconductor Operation. Mr. Gallagher
began his career in 1966 with ITT UK as a semiconductor process engineer.
 
  Thomas C. Leonard joined the Company in 1992 as General Manager of the
Components and Systems Division. He became the General Manager of Operations
for the Alpha Microwave Division effective January 1994 and was elected a Vice
President in 1994. Mr. Leonard has over 30 years experience in the microwave
industry, having held a series of general managerial and marketing positions
at M/A-COM, Inc., from 1972 to 1992 and prior to 1972 at Varian Associates and
Sylvania.
 
  Joseph J. Alberici joined Trans-Tech, Inc., a subsidiary of the Company, in
1987 and has held several positions with Trans-Tech, Inc., including Vice
President of Marketing and New Products, Executive Vice President and Chief
Operating Officer. He has been President and Chief Executive Officer of Trans-
Tech, Inc. since 1992 and was elected Vice President of the Company in 1994.
Prior to 1987, Mr. Alberici was Plant Manager of the Microwave Products
Division for MuRata Erie NA. In addition, from approximately 1974 to 1979, Mr.
Alberici held several engineering positions with Lambda Electronics and
American Technical Ceramic.
 
  Paul E. Vincent has held his position as Controller since he joined the
Company in 1979.
 
  Arthur Pappas, a Director of the Company since 1988, was a founder and, from
1969 to 1979, Vice President Finance and Operations of Datel Systems, Inc., a
manufacturer of data conversion products. Mr. Pappas was a founder and, from
1980 to 1984, President of Power General Corporation, a manufacturer of
switching power supplies. Mr. Pappas then founded and from 1985 to 1988 was
Chairman of Metra-Byte Corporation, a manufacturer of measurement and control
products for personal computers. Most recently, Mr. Pappas founded and since
1994 has been Chairman of Astrodyne Corporation, a manufacturer of power
supplies.
 
  Raymond Shamie, a Director of the Company since 1985, was President of
Shamie Management Corporation from 1986 to 1995. Prior to 1986, Mr. Shamie was
Chairman of the Board and Chief Executive Officer of Metal Bellows
Corporation, a manufacturer of pressure sensing and fluid control systems for
aerospace and nuclear applications.
 
  Sidney Topol, a Director of the Company since 1992, is a Director of
Scientific Atlanta, Inc., a manufacturer of satellite communications and cable
television equipment, and Wandel and Golterman Technologies, Inc., a
manufacturer of test instruments. Mr. Topol has been President of The Topol
Group, Inc., a consulting company, since 1989. Mr. Topol was President of
Scientific Atlanta, Inc. from 1971 to 1983, Chief Executive Officer from 1975
to 1987, and Chairman of the Board from 1978 to 1990. Prior to 1971, Mr. Topol
held various executive positions with Raytheon Company for 22 years.
 
  Charles A. Zraket became a Director of the Company in September 1995. From
1958 until 1990, Dr. Zraket was employed in various capacities, most recently
as President and Chief Executive Officer, by the MITRE Corporation, a not-for-
profit research and systems engineering organization. Dr. Zraket currently is
a trustee of the MITRE Corporation, Northeastern University, Beth Israel
Hospital, the Hudson Institute and Chairman of the Computer Museum in Boston.
He is also a Director of Wyman-Gordon Corporation.
 
                                      35

<PAGE>
 
                         DESCRIPTION OF CAPITAL STOCK
                               AND OTHER MATTERS
 
  The authorized capital stock of the Company consists of 30,000,000 shares of
Common Stock, $.25 par value per share.
 
  The following descriptions of the capital stock and certain additional
charter provisions relating to changes in control and directors' liability,
are qualified in their entirety by reference to the Company's Restated
Certificate of Incorporation and Amended and Restated By-Laws.
 
COMMON STOCK
 
  The issued and outstanding shares of Common Stock are validly issued, fully
paid and non-assessable. The Common Stock offered hereby, when issued and sold
as contemplated by this Prospectus, will be validly issued, fully paid and
non-assessable.
 
  The holders of Common Stock are entitled to one vote per share on all
matters to be voted upon by the stockholders of the Company. The holders of
Common Stock are entitled to receive dividends out of assets legally available
therefor at such times and in such amounts as the Board of Directors may
determine. For a description of contractual limitations on the Company's
ability to pay dividends, see "Dividend Policy." The shares of Common Stock
are neither redeemable nor convertible, and the holders thereof have no
preemptive or, except as described under "Rights Distribution," below,
subscription rights to purchase any securities of the Company. Upon
liquidation, dissolution or winding up of the Company, the holders of Common
Stock are entitled to receive pro rata the assets of the Company which are
legally available for distribution, after payment of all debts and other
liabilities.
 
  At September 30, 1995, 7,808,722 shares of Common Stock were outstanding and
held of record by approximately 1,200 stockholders. Options to purchase an
aggregate of 849,222 shares of Common Stock were also outstanding at September
30, 1995.
 
WARRANT
 
  As of September 30, 1995, the Company had outstanding an immediately
exercisable warrant to purchase 50,000 shares of Common Stock, at an exercise
price of $3.75 per share. This warrant is held by Silicon Valley Bank and
expires on April 1, 1999. In the event that the Company registers any of its
securities under the Securities Act, Silicon Valley Bank has the right to
require the Company to register the shares issuable pursuant to the warrant,
subject to certain limitations, as set forth in the warrant. These
registration rights have been waived with respect to this offering.
 
TRANSFER AGENT AND REGISTRAR
 
  The Transfer Agent and Registrar of the Common Stock is BancBoston State
Street Investor Services.
 
ADDITIONAL CHARTER PROVISIONS
 
  The Company's Restated Certificate of Incorporation and Amended and Restated
By-Laws include several provisions which may render more difficult an
unfriendly tender offer, proxy contest, merger or change in control of the
Company. See "Risk Factors--Impediments to Changes in Control."
 
  The Company's Restated Certificate of Incorporation provides (i) for the
classification of the Board of Directors into three classes with staggered
terms of office, (ii) that all stockholder action must be taken at a
stockholders' meeting, thereby eliminating the right to take action by written
consent of the holders of 51% of the outstanding Common Stock, (iii) that the
affirmative vote of the holders of 80% of the Company's outstanding voting
stock is necessary to approve a merger or consolidation, a sale, lease,
exchange, mortgage, pledge or other disposition of substantially all of the
Company's assets, or the issuance or transfer of securities
 
                                      36

<PAGE>
 
or assets of the Company having a fair market value exceeding $500,000 in
exchange for securities of another business entity, unless such transaction is
approved by a majority of the directors who held office prior to the time a
person or entity proposing such a transaction became the beneficial owner of
5% of the outstanding stock of the Company and (iv) that 80% of the number of
outstanding shares of Common Stock is required to amend these provisions in
the Restated Certificate of Incorporation. The Restated Certificate of
Incorporation also requires business combinations involving the Company and
any holder (including affiliates, associates and others who may be acting in
concert with such holder) of more than 20% of the voting power of the
Company's outstanding capital stock (a "Related Person") to be approved by the
holders of 90% of the outstanding voting stock of the Company, unless (i) the
business combination is approved by a majority of the members of the Board of
Directors who are unaffiliated with the Related Person and who were members of
the Board of Directors at the time the Related Person became a Related Person
("Continuing Directors") or successor directors recommended by such Continuing
Directors who are also unaffiliated with the Related Person, and (ii) certain
minimum price requirements and other conditions are met. Amendment of the
"fair price provision" may be effected only by a vote of the holders of 90% or
more of all of the Company's outstanding shares of voting stock.
 
  The Company's Amended and Restated By-Laws do not authorize stockholders
holding a majority of the Company's outstanding voting stock to call a special
meeting of stockholders. Special meetings of stockholders may only be called
by the President or by the Board of Directors. The Amended and Restated By-
Laws also provide that directors may be removed only for cause.
 
  Options issued under the Company's 1986 Long-Term Incentive Plan and the
1994 Non-Qualified Stock Option Plan for Non-Employee Directors are subject to
vesting schedules ranging from one to five years. However, such options become
immediately exercisable upon a change in control of the Company.
 
RIGHTS DISTRIBUTION
 
  In 1986, the Board of Directors declared a dividend distribution of one
right (a "Right") for each outstanding share of Common Stock held of record on
December 5, 1986 or issued thereafter prior to the "Separation Time," as
defined below. After December 5, 1986 and for so long as the Rights are not
transferable separately from the Common Stock, one Right is deemed to be
delivered with each share of Common Stock issued or transferred by the
Company, including shares of Common Stock issuable in this offering and under
the Company's Savings and Retirement Plan, Employee Stock Purchase Plan, 1994
Non-Qualified Stock Option Plan for Non-Employee Directors and the 1986 Long-
Term Incentive Plan.
 
  The "Separation Time" is the close of business on the earlier of (i) the
tenth business day (or such earlier or later date not beyond the thirtieth day
as the Board of Directors may decide) (a "Flip-in Date"), after the
announcement that a person has acquired 10% or more of the outstanding Common
Stock of the Company (or that a person already owning 10% has acquired any
more Common Stock) (an "Acquiring Person") or (ii) the tenth business day (or
such later date as the Board of Directors may decide) after any person
commences a tender or exchange offer to acquire beneficial ownership of 10% or
more of the outstanding shares of Common Stock. Until the Separation Time, the
Rights will be evidenced solely by the Common Stock certificates and may be
transferred only with the Common Stock.
 
  After the Separation Time, the Rights become exercisable and may be
transferred independently of shares of Common Stock, and separate certificates
evidencing the Rights will be mailed to stockholders. The Rights will expire
on the earlier of (i) December 5, 1996, or (ii) the date on which the Rights
are redeemed.
 
  Commencing after a Flip-in Date has occurred, the holders of Rights, except
the Acquiring Person, are entitled to purchase that number of shares of the
Company's Common Stock having a market value equal to twice the exercise price
of $30 per share (the "Exercise Price"). However, in lieu of the right to
purchase shares of the Company's Common Stock at an effective 50% discount,
the Board of Directors of the Company may elect to issue one share of Common
Stock for each Right held by each holder other than the Acquiring Person.
 
                                      37

<PAGE>
 
  After an Acquiring Person has become such and prior to the expiration of the
Rights, the Company may not (i) consolidate or merge with any other person,
(ii) sell or otherwise transfer to any other person more than 50% of the
Company's assets, or assets generating more than 50% of the Company's
operating income or cash flow, (iii) engage in certain self-dealing
transactions with Acquiring Persons, or (iv) permit certain events to occur
when there is an Acquiring Person, if at the time of such merger, sale or
self-dealing transaction the Acquiring Person controls the board of directors
and, in the case of merger, will receive different treatment than other
stockholders, unless in any such case provision is made so that each holder of
a Right will thereafter have the right to receive, at the then current
Exercise Price, a number of shares of common stock of the Acquiring Person
engaging in the transaction having a market value equal to two times the
Exercise Price of the Right.
 
  The Rights may be redeemed by the Company for $.05 per Right, either in cash
or in Common Stock, at any time prior to the close of business on a Flip-in
Date.
 
  The provisions in the Restated Certificate of Incorporation and Amended and
Restated By-Laws referred to above, and the authority under the 1986 Long-Term
Incentive Plan to grant options with accelerated vesting schedules in the
event of a change in control of the Company, as well as the authority of the
Board of Directors to issue additional shares of Common Stock and accelerate
the exercisability of the Rights could be used by the Board of Directors in a
manner calculated to prevent the removal of management and make more difficult
or discourage a change in control of the Company. The distribution of Rights
and certain aspects of the foregoing provisions in the Company's Restated
Certificate of Incorporation and Amended and Restated By-Laws were designed to
afford the Board of Directors the opportunity to evaluate the terms of a
takeover attempt without haste or undue pressure, advise stockholders of its
findings, and to negotiate to protect the interests of all stockholders. See
"Risk Factors--Impediments to Changes in Control."
 
LIMITATION OF DIRECTORS' LIABILITY
 
  The Company's Restated Certificate of Incorporation includes provisions (i)
to eliminate the personal liability of the Company's directors to the Company
or its stockholders for monetary damages resulting from breaches of their
fiduciary duty (subject to certain exceptions, such as breach of the duty of
loyalty to the Company or its stockholders) and (ii) to permit the Company to
indemnify its directors and officers to the fullest extent permitted by law.
The Company's Amended and Restated By-Laws include provisions for mandatory
indemnification of its officers and directors provided certain conditions are
met.
 
  The Company has directors' and officers' liability insurance.
 
                                      38

<PAGE>
 
                                 UNDERWRITING
 
  Montgomery Securities, Oppenheimer & Co., Inc. and Adams, Harkness & Hill,
Inc. (the "Underwriters") have agreed, subject to the terms and conditions set
forth in the underwriting agreement (the "Underwriting Agreement"), to
purchase from the Company the number of shares of Common Stock indicated
below, opposite their respective names, at the public offering price less the
underwriting discount set forth on the cover page of this Prospectus. The
Underwriting Agreement provides that the obligations of the Underwriters are
subject to certain conditions precedent and that the Underwriters are
committed to purchase all of such shares if any are purchased.
 

<TABLE>
<CAPTION>
                                                                        Number
   Underwriters                                                        of Shares
   ------------                                                        ---------
   <S>                                                                 <C>
   Montgomery Securities..............................................
   Oppenheimer & Co., Inc.............................................
   Adams, Harkness & Hill, Inc........................................
                                                                       ---------
     TOTAL............................................................ 2,000,000
                                                                       =========
</TABLE>

 
  The Underwriters have advised the Company that they propose initially to
offer the shares of Common Stock to the public on the terms set forth on the
cover page of this Prospectus. The Underwriters may allow selected dealers a
concession of not more than $   per share; and the Underwriters may allow, and
such dealers may reallow, a concession of not more than $   per share to
certain other dealers. After the offering, the offering price and other
selling terms may be changed by the Underwriters. The Common Stock is offered
subject to receipt and acceptance by the Underwriters and to certain other
conditions, including the right to reject orders in whole or in part.
 
  The Company has granted an option to the Underwriters, exercisable during
the 30-day period after the date of this Prospectus, to purchase up to a
maximum of 300,000 additional shares of Common Stock solely to cover over-
allotments, if any, at the same price per share as the initial 2,000,000
shares to be purchased by the Underwriters. To the extent that the
Underwriters exercise this option, the Underwriters will be committed, subject
to certain conditions, to purchase such additional shares in approximately the
same proportion as set forth in the above table. The Underwriters may purchase
such shares only to cover over-allotments made in connection with this
offering.
 
  The Underwriting Agreement provides that the Company will indemnify the
Underwriters against certain liabilities, including civil liabilities under
the Securities Act, or will contribute to payments the Underwriters may be
required to make in respect thereof.
 
  All of the directors and executive officers of the Company, holding an
aggregate of 497,692 shares of Common Stock (including 396,400 shares of
Common Stock issuable under stock options that are or will become vested as of
90 days from the date of this Prospectus), have agreed that they will not,
without the prior written consent of Montgomery Securities, directly or
indirectly, offer, sell, contract to sell, make any short sale, pledge,
establish an open "put equivalent position" within the meaning of Rule 16a-
1(h) under the Exchange Act, or otherwise dispose of any shares of Common
Stock, options to acquire shares of Common Stock or any securities convertible
or exchangeable for shares of Common Stock, or publicly announce the intention
to do any of the foregoing, for a period of 90 days after the day on which the
registration statement including this Prospectus becomes effective by order of
the Securities and Exchange Commission ("Effective Date"). In addition, the
Company has agreed in the Underwriting Agreement that, without the prior
written consent of Montgomery Securities, it will not issue, offer, sell, or
grant shares of Common Stock or options to purchase such shares (other than
options or shares granted or issued pursuant to the Company's 1986 Long-Term
Incentive Plan, Savings and Retirement Plan, 1994 Non-Qualified Stock Option
Plan for Non-Employee Directors, Employee Stock Purchase Plan) or otherwise
dispose of the Company's equity securities, or any other securities
convertible into or exchangeable for the Company's Common Stock or other
equity securities for a period of 90 days after the first date that any shares
of Common Stock are released for sale in the offering.
 
                                      39

<PAGE>
 
                                 LEGAL MATTERS
 
  The validity of the securities offered by the Company hereby has been passed
upon for the Company by Brown, Rudnick, Freed & Gesmer, Boston, Massachusetts.
A member of such firm is the Secretary of the Company and beneficially owns a
nominal number of shares of Common Stock. Certain legal matters in connection
with the Common Stock offered hereby will be passed upon for the Underwriters
by Foley, Hoag & Eliot, Boston, Massachusetts.
 
                                    EXPERTS
 
  The consolidated financial statements and schedules of Alpha Industries, Inc.
and subsidiaries as of April 2, 1995 and April 3, 1994, and for each of the
years in the three-year period ended April 2, 1995, have been incorporated by
reference herein and in the registration statement to which this Prospectus
relates in reliance upon the report of KPMG Peat Marwick LLP, independent
certified public accountants, and upon the authority of said firm as experts in
accounting and auditing. The report of KPMG Peat Marwick LLP refers to the
adoption of Financial Accounting Standard Board's Statement of Financial
Accounting Standards No. 109, "Accounting for Income Taxes" in fiscal 1994.
 
                                       40

<PAGE>
 
                                     ALPHA
 
  There is a collage of photographs showing a pager, a cellular telephone in
use, a global positioning device in use and a number of the Company's products,
including an antenna, component, MIMICs, semiconductors and ceramic material.

<PAGE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
  No dealer, sales representative or any other person has been authorized to
give any information or make any representations other than those contained in
this Prospectus in connection with the offering described herein, and, if
given or made, such information or representations must not be relied upon as
having been authorized by the Company or any of the Underwriters. This
Prospectus does not constitute an offer to sell or a solicitation of an offer
to buy any securities other than the shares of Common Stock to which it
relates, or an offer to, or solicitation of, any person in any jurisdiction
where such offer or solicitation would be unlawful. Neither the delivery of
this Prospectus nor any sale made hereunder shall, under any circumstances,
create an implication that there has been no change in the affairs of the
Company or that information contained herein is correct as of any time
subsequent to the date hereof.
 
                              -------------------
 
                               TABLE OF CONTENTS
 
                              -------------------
 

<TABLE>
<CAPTION>
                                                                          Page
                                                                          ----
<S>                                                                       <C>
Available Information....................................................   3
Incorporation of Certain Documents by
 Reference...............................................................   3
Prospectus Summary.......................................................   4
Risk Factors.............................................................   7
Use of Proceeds..........................................................  14
Dividend Policy..........................................................  15
Price Range of Common Stock..............................................  15
Capitalization...........................................................  16
Selected Consolidated Financial Data.....................................  17
Management's Discussion and Analysis of Financial Condition and Results
 of Operations...........................................................  18
Business.................................................................  23
Management...............................................................  34
Description of Capital Stock and Other
 Matters.................................................................  36
Underwriting.............................................................  39
Legal Matters............................................................  40
Experts..................................................................  40
</TABLE>

 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
 
                               2,000,000 SHARES
 
 
                             LOGO ALPHA INDUSTRIES
 
                                 COMMON STOCK
 
                                ---------------
 
                                  PROSPECTUS
 
                                ---------------
 
                             Montgomery Securities
 
                            Oppenheimer & Co., Inc.
 
                         Adams, Harkness & Hill, Inc.
 
                                      , 1995
 
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------

<PAGE>
 

                                    PART II
 
                    INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION
 

<TABLE>
   <S>                                                                 <C>
   SEC Registration Fee............................................... $ 12,294
   NASD Filing Fee....................................................    4,224
   American Stock Exchange Listing Fee................................   17,500
   Blue Sky Fees and Expenses.........................................   25,000*
   Transfer Agent and Registrar Fees..................................    5,000*
   Accounting Fees and Expenses.......................................   20,000*
   Legal Fees and Expenses............................................  250,000*
   Printing and Engraving ............................................  100,000*
   Miscellaneous......................................................   15,982*
                                                                       --------
       TOTAL..........................................................  450,000*
                                                                       ========
</TABLE>

- --------
* Estimated
 
ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
  Article Tenth of the Company's Restated Certificate of Incorporation
eliminates the personal liability of directors to the Company or its
stockholders for monetary damages for breaches of their fiduciary duty
(subject to certain exceptions, such as breaches of the duty of loyalty to the
Company or its stockholders), and provides that the Company may indemnify its
officers and directors to the full extent permitted by law. The Company's
Amended and Restated By-Laws include provisions for mandatory indemnification
of its officers and directors provided certain conditions are met. Section 145
of the General Corporation Law of the State of Delaware authorizes a
corporation to indemnify directors, officers, employees or agents of the
corporation in non-derivative suits if such party acted in good faith and in a
manner he reasonably believed to be in or not opposed to the best interest of
the corporation and, with respect to any criminal action or proceeding, had no
reasonable cause to believe his conduct was unlawful, as determined in
accordance with the Delaware General Corporation Law. Section 145 further
provides that indemnification shall be provided if the party in question is
successful on the merits or otherwise.
 
  Reference is hereby made to the caption "Description of Capital Stock and
Other Matters--Limitation of Directors' Liability" in the Prospectus, which is
a part of this Registration Statement.
 
  The effect of these provisions would be to permit such indemnification by
the Company for liabilities arising under the Securities Act of 1933, as
amended, to the extent permitted under the Act.
 
  Reference is hereby made to Section 10 of the Underwriting Agreement between
the Company and the Underwriters, filed as Exhibit 1(a) to this Registration
Statement, for a description of indemnification arrangements between the
Company and the Underwriter.
 
ITEM 16. EXHIBITS
 
  See Exhibit Index following signature page.
 
ITEM 17. UNDERTAKINGS
 
  (a) The undersigned Registrant hereby undertakes:
 
    (1) That, for purposes of determining any liability under the Securities
  Act of 1933, each filing of the Registrant's annual report pursuant to
  Section 13(a) or 15(d) of the Securities Exchange Act of 1934 that is
  incorporated by reference in the Registration Statement shall be deemed to
  be a new registration statement
 
                                     II-1

<PAGE>
 
  relating to the securities offered therein, and the offering of such
  securities at that time shall be deemed to be the initial bona fide
  offering thereof;
 
    (2) That, for purposes of determining any liability under the Securities
  Act of 1933, the information omitted from the form of prospectus filed as
  part of this Registration Statement in reliance upon Rule 430A and
  contained in a form of prospectus filed by the Registrant pursuant to Rule
  424(b)(1) or (4) or 497(h) under the Securities Act of 1933 shall be deemed
  to be part of this Registration Statement as of the time it was declared
  effective;
 
    (3) That, for the purpose of determining any liability under the
  Securities Act of 1933, each post-effective amendment that contains a form
  of prospectus shall be deemed to be a new registration statement relating
  to the securities offered therein, and the offering of such securities at
  that time shall be deemed to be the initial bona fide offering thereof.
 
  (b) Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers and controlling persons of
the Registrant pursuant to the Registrant's Amended and Restated By-Laws, or
otherwise, the Registrant has been advised that, in the opinion of the
Securities and Exchange Commission, such indemnification is against public
policy as expressed in the Act and is, therefore, unenforceable. In the event
that a claim for indemnification against such liabilities (other than the
payment by the Registrant of expenses incurred or paid by a director, officer
or controlling person of the Registrant in the successful defense of any
action, suit or proceeding) is asserted by such director, officer or
controlling person in connection with the securities being registered, the
Registrant will, unless in the opinion of its counsel the matter has been
settled by controlling precedent, submit to a court of appropriate jurisdiction
the question whether such indemnification by it is against public policy as
expressed in the Act and will be governed by the final adjudication of such
issue.
 
                                      II-2

<PAGE>
 

                                   SIGNATURES
 
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE REGISTRANT
CERTIFIES THAT IT HAS REASONABLE GROUNDS TO BELIEVE THAT IT MEETS ALL OF THE
REQUIREMENTS FOR FILING ON FORM S-3 AND HAS DULY CAUSED THIS REGISTRATION
STATEMENT TO BE SIGNED ON ITS BEHALF BY THE UNDERSIGNED, THEREUNTO DULY
AUTHORIZED, IN THE CITY OF WOBURN, COMMONWEALTH OF MASSACHUSETTS, ON OCTOBER
26, 1995.
 
                                         Alpha Industries, Inc.
 
                                                   /s/ Martin J. Reid
                                         By: __________________________________
                                           Martin J. Reid,
                                           President
 
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS REGISTRATION
STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE CAPACITIES AND ON THE
DATES INDICATED.
 
             SIGNATURES                      TITLE                 DATE
 
       /s/ George S. Kariotis         Chairman of the          October 26,
- ------------------------------------   Board                       1995
         GEORGE S. KARIOTIS
 
         /s/ Martin J. Reid           President, Chief         October 26,
- ------------------------------------   Executive Officer           1995
           MARTIN J. REID              and Director
                                       (Principal
                                       Executive Officer)
 
        /s/ David J. Aldrich          Vice President,          October 26,
- ------------------------------------   Treasurer and               1995
          DAVID J. ALDRICH             Chief Financial
                                       Officer (Principal
                                       Financial Officer)
 
        /s/ Paul E. Vincent           Controller (Chief        October 26,
- ------------------------------------   Accounting                  1995
          PAUL E. VINCENT              Officer)
 
         /s/ Arthur Pappas            Director                 October 26,
- ------------------------------------                               1995
           ARTHUR PAPPAS
 
         /s/ Raymond Shamie           Director                 October 26,
- ------------------------------------                               1995
           RAYMOND SHAMIE
 
          /s/ Sidney Topol            Director                 October 26,
- ------------------------------------                               1995
            SIDNEY TOPOL
 
       /s/ Charles A. Zraket          Director                 October 26,
- ------------------------------------                               1995
         CHARLES A. ZRAKET
 
                                      II-3

<PAGE>
 
                               POWER OF ATTORNEY
 
  KNOW ALL MEN BY THESE PRESENTS, THAT EACH PERSON WHOSE SIGNATURE APPEARS
BELOW CONSTITUTES AND APPOINTS GEORGE S. KARIOTIS, MARTIN J. REID AND DAVID J.
ALDRICH, AND EACH OF THEM (WITH FULL POWER TO EACH OF THEM TO ACT ALONE), HIS
TRUE AND LAWFUL ATTORNEYS-IN-FACT AND AGENTS, WITH FULL POWER OF SUBSTITUTION
AND RESUBSTITUTION, FOR HIM AND IN HIS NAME, PLACE AND STEAD, IN ANY AND ALL
CAPACITIES, TO SIGN ANY OR ALL AMENDMENTS (INCLUDING POST-EFFECTIVE AMENDMENTS)
TO THIS REGISTRATION STATEMENT, AND TO FILE THE SAME, WITH ALL EXHIBITS THERETO
AND OTHER DOCUMENTS IN CONNECTION THEREWITH, WITH THE SECURITIES AND EXCHANGE
COMMISSION, GRANTING UNTO SAID ATTORNEYS-IN-FACT AND AGENTS, AND EACH OF THEM,
FULL POWER AND AUTHORITY TO DO AND PERFORM EACH AND EVERY ACT AND THING
REQUISITE AND NECESSARY TO BE DONE IN AND ABOUT THE PREMISES, AS FULLY TO ALL
INTENTS AND PURPOSES AS HE MIGHT OR COULD DO IN PERSON, HEREBY RATIFYING AND
CONFIRMING ALL THAT SAID ATTORNEYS-IN-FACT AND AGENTS, OR ANY OF THEM, OR THEIR
SUBSTITUTES, MAY LAWFULLY DO OR CAUSE TO BE DONE BY VIRTUE HEREOF.
 
             SIGNATURES                      TITLE                 DATE
 
       /s/ George S. Kariotis         Chairman of the          October 26,
- ------------------------------------   Board                       1995
         GEORGE S. KARIOTIS
 
         /s/ Martin J. Reid           President, Chief         October 26,
- ------------------------------------   Executive Officer           1995
           MARTIN J. REID              and Director
                                       (Principal
                                       Executive Officer)
 
        /s/ David J. Aldrich          Vice President,          October 26,
- ------------------------------------   Treasurer and               1995
          DAVID J. ALDRICH             Chief Financial
                                       Officer (Principal
                                       Financial Officer)
 
        /s/ Paul E. Vincent           Controller (Chief        October 26,
- ------------------------------------   Accounting                  1995
          PAUL E. VINCENT              Officer)
 
         /s/ Arthur Pappas            Director                 October 26,
- ------------------------------------                               1995
           ARTHUR PAPPAS
 
         /s/ Raymond Shamie           Director                 October 26,
- ------------------------------------                               1995
           RAYMOND SHAMIE
 
          /s/ Sidney Topol            Director                 October 26,
- ------------------------------------                               1995
            SIDNEY TOPOL
 
       /s/ Charles A. Zraket          Director                 October 26,
- ------------------------------------                               1995
         CHARLES A. ZRAKET
 
                                      II-4

<PAGE>
 

                                 EXHIBIT INDEX
 

<TABLE>
<CAPTION>
 EXHIBIT                                                             SEQUENTIAL
 NUMBER                                                               PAGE NO.
 -------                                                             ----------
 <C>     <S>                                                         <C>
  1(a)   Form of Underwriting Agreement.
  3(a)   Restated Certificate of Incorporation of the Registrant.
  3(b)   Amended and Restated By-Laws of the Registrant (filed as
         Exhibit 3(b) to the Registrant's Annual Report on Form
         10-K for the year ended March 29, 1992).                        *
  4(a)   Specimen Certificate of Common Stock.
  4(b)   Amended and Restated Rights Agreement dated as of               *
         November 24, 1986, as amended and restated July 3, 1990
         and as further amended September 9, 1990 and September
         24, 1990 between Registrant and The First National Bank
         of Boston, as Rights Agent. The July 3, 1990 restatement
         and the September 9, 1990 and September 24, 1990
         amendments were filed as Exhibit 4 to the Current Report
         on Form 8-K dated July 3, 1990 and Exhibits 4(a) and 4(b)
         to the Current Report on Form 8-K dated September 18,
         1990, respectively.
  4(c)   Stock Purchase Warrant for 50,000 shares of the                 *
         Registrant's Common Stock issued to Silicon Valley Bank
         as of April 1, 1994 (Filed as Exhibit 4(i) to the
         Quarterly Report on Form 10-Q for the quarter ended July
         3, 1994).
  5      Legal Opinion of Brown, Rudnick, Freed & Gesmer regarding
         legality of Common Stock.
 23(a)   Consent of Brown, Rudnick, Freed & Gesmer (contained in
         Exhibit 5).
 23(b)   Consent of Independent Auditors.
 24      Power of Attorney (contained in Part II of Registration
         Statement)
</TABLE>

- --------
* Not filed herewith, incorporated by reference to documents previously filed
  with the Commission.

<PAGE>
 
                        DESCRIPTION OF GRAPHIC MATERIAL
                        -------------------------------


Page 24
- -------

   Bar chart, entitled "Commercial Applications," illustrating various     
commercial wireless communications applications and the radio frequencies    
assigned to them.                                                           


Page 27
- -------

   Diagram entitled "Typical Wireless Communications Handsets" depicting the  
basic circuitry of a typical wireless communications handset, indicating those 
products or components that are supplied by the Company.                        


Page 28
- -------

   Chart illustrating the principal wireless communications applications in 
which the Company's products are used, indicating which product line is
applicable to each type of application.







<PAGE>
 
                                                               Draft of 10/24/95


                               2,000,000 SHARES


                            ALPHA INDUSTRIES, INC.


                                 COMMON STOCK



                            UNDERWRITING AGREEMENT
                            ----------------------



                                                           _______________, 1995



Montgomery Securities
Oppenheimer & Co., Inc.
Adams, Harkness & Hill, Inc.
 As Representatives of the several Underwriters
c/o Montgomery Securities
600 Montgomery Street
San Francisco, California  94111

Ladies and Gentlemen:

   SECTION 1.  INTRODUCTORY.  Alpha Industries, Inc., a Delaware corporation
(the "Company), proposes to issue and sell 2,000,000 shares of  its  authorized
but  unissued  Common Stock, $.25 par value per share (the "Common Stock"), to
the several underwriters named in Schedule A hereto (the "Underwriters"), for
which you are acting as representatives (the "Representatives").  Said aggregate
of 2,000,000 shares are herein called the "Firm Common Shares."  In addition,
the Company proposes to grant to the Underwriters an option to purchase up to
300,000 additional shares of Common Stock (the "Optional Common Shares"), as
provided in Section 4.  The Firm Common Shares and, to the extent such option
is exercised, the Optional Common Shares are hereinafter collectively referred
to as the "Common Shares."

   The Underwriters have advised the Company that the Underwriters propose to
make a public offering of their respective portions
 of the Common Shares on the
effective date of the registration statement hereinafter referred to, or as soon
thereafter as in the Representatives' judgment is advisable.

   The Company hereby confirms its agreement with respect to the purchase of the
Common Shares by the Underwriters as follows:

<PAGE>
 
   SECTION 2.  REPRESENTATIONS AND WARRANTIES OF THE COMPANY.  The Company
hereby represents and warrants to the several Underwriters that:

      (a)  A registration statement on Form S-3 (File No. 33-______) with
   respect to the Common Shares has been prepared by the Company in conformity
   with the requirements of the Securities Act of 1933, as amended (the "Act"),
   and the rules and regulations (the "Rules and Regulations") of the Securities
   and Exchange Commission (the "Commission") thereunder, and has been filed
   with the Commission. The Company has prepared and has filed or proposes to
   file prior to the effective date of such registration statement an amendment
   or amendments to such registration statement, which amendment or amendments
   have been or will be similarly prepared. There have been delivered to the
   Representatives two signed copies of such registration statement and
   amendments, together with two copies of each exhibit filed therewith.
   Conformed copies of such registration statement and amendments (but without
   exhibits) and copies of the related preliminary prospectus have been
   delivered to the Representatives in such reasonable quantities as the
   Representatives have requested for each of the Underwriters. The Company will
   next file with the Commission one of the following: (i) prior to
   effectiveness of such registration statement, a further amendment thereto,
   including the form of final prospectus, (ii) a final prospectus in accordance
   with Rules 430A and 424(b) of the Rules and Regulations, or (iii) a term
   sheet (the "Term Sheet") as described in and in accordance with Rules 434 and
   424(b) of the Rules and Regulations. As filed, the final prospectus, if one
   is used, or the Term Sheet and Preliminary Prospectus (as hereinafter
   defined), if a final prospectus is not used, shall include all Rule 430A
   Information (as hereinafter defined) and, except to the extent that the
   Representatives shall agree in writing to a modification, shall be in all
   substantive respects in the form furnished to the Representatives prior to
   the date and time that this Agreement was executed and delivered by the
   parties hereto, or, to the extent not completed at such date and time, shall
   contain only such specific additional information and other changes (beyond
   that contained in the latest Preliminary Prospectus, as hereinafter defined)
   as the Company shall have previously advised the Representatives in writing
   would be included or made therein.

      The term "Registration Statement" as used in this Agreement shall mean
   such registration statement at the time such registration statement becomes
   effective and, in the event any post-effective amendment thereto becomes
   effective prior to the First Closing Date (as hereinafter defined), shall
   also mean such registration statement as so amended; provided, however, that
   such term shall also include (i) all Rule 430A Information deemed to be
   included in such registration statement at the time such registration
   statement becomes effective as provided by Rule 430A of the Rules and
   Regulations, and (ii) a registration statement, if any, filed pursuant to
   Rule 426(b) of the Rules and Regulations relating to the Common Shares.  The
   term "Preliminary Prospectus" shall mean any preliminary prospectus referred
   to in the preceding paragraph and any preliminary prospectus included in the
   Registration Statement at the time it becomes effective that omits Rule 430A
   Information.  The term "Prospectus" as used in this Agreement shall mean
   either (i) the prospectus relating to the Common Shares in the form in which
   it is first filed with the Commission pursuant to Rule 424(b) of the Rules
   and Regulations or, (ii) if a Term Sheet is not used and no filing pursuant
   to Rule 424(b) of the Rules and Regulations is required, the form of final
   prospectus included in the Registration Statement at the time such
   registration statement becomes effective, or (iii) if a Term Sheet is used,
   the Term Sheet in the form in which it is first filed with the Commission
   pursuant to Rule 424(b) of the Rules and Regulations, together with the
   Preliminary Prospectus included in the Registration Statement at the time it
   become effective.  The term "Rule 430A Information" shall mean information
   with respect to the Common Shares and the offering thereof permitted to be
   omitted from the Registration Statement when it becomes effective pursuant to
   Rule 430A of the Rules and Regulations.  Any reference herein to any
   Preliminary Prospectus or the Prospectus shall be deemed to refer to and
   include the documents incorporated by reference

                                       2

<PAGE>
 
   therein pursuant to Form S-3 under the Act, as of the date of such
   Preliminary Prospectus or Prospectus, as the case may be.

      (b)  The Commission has not issued any order preventing or suspending the
   use of any Preliminary Prospectus, and each Preliminary Prospectus has
   conformed in all material respects to the requirements of the Act and the
   Rules and Regulations and, as of its date, has not included any untrue
   statement of a material fact or omitted to state a material fact necessary to
   make the statements therein, in the light of the circumstances under which
   they were made, not misleading; and at the time the Registration Statement
   becomes effective, and at all times subsequent thereto up to and including
   each Closing Date hereinafter mentioned, the Registration Statement and the
   Prospectus, and any amendments or supplements thereto, will contain all
   material statements and information required to be included therein by the
   Act and the Rules and Regulations and will in all material respects conform
   to the requirements of the Act and the Rules and Regulations, and neither the
   Registration Statement nor the Prospectus, nor any amendment or supplement
   thereto, will include any untrue statement of a material fact or omit to
   state a material fact required to be stated therein or necessary to make the
   statements therein not misleading; provided, however, no representation or
   warranty contained in this Section 2(b) shall be applicable to information
   contained in or omitted from any Preliminary Prospectus, the Registration
   Statement, the Prospectus or any such amendment or supplement in reliance
   upon and in conformity with written information furnished to the Company by
   or on behalf of any Underwriter, directly or through the Representatives,
   specifically for use in the preparation thereof.  The documents incorporated
   by reference in the Prospectus, when they were filed with the Commission,
   conformed in all material respects to the requirements of the Securities
   Exchange Act of 1934, as amended (the "Exchange Act"), and the rules and
   regulations of the Commission thereunder, and none of such documents
   contained an untrue statement of a material fact or omitted to state a
   material fact required to be stated therein or necessary to make the
   statements therein not misleading.

      (c)  The Company does not own or control, directly or indirectly, any
   corporation, association or other entity other than the subsidiaries listed
   in Exhibit 21 to the Annual Report on Form 10-K of the Company for the fiscal
   year ended April 2, 1995.  The Company and each of its subsidiaries have been
   duly incorporated and are validly existing as corporations in good standing
   under the laws of their respective jurisdictions of incorporation, with full
   power and authority (corporate and other) to own and lease their properties
   and conduct their respective businesses as described in the Prospectus; the
   Company owns all of the outstanding capital stock of its subsidiaries free
   and clear of all claims, liens, charges and encumbrances, except that Trans-
   Tech, Inc. owns, free and clear of all claims, liens, charges and
   encumbrances, certain of the outstanding shares of capital stock of Trans-
   Tech Europe SARL; the Company and each of its subsidiaries are in possession
   of and operating in compliance with all authorizations, licenses, permits,
   consents, certificates and orders material to the conduct of their respective
   businesses, all of which are valid and in full force and effect; the Company
   and each of its subsidiaries are duly qualified to do business and in good
   standing as foreign corporations in each jurisdiction in which the ownership
   or leasing of properties or the conduct of their respective businesses
   requires such qualification, except for jurisdictions in which the failure to
   so qualify would not have a material adverse effect on the Company or the
   subsidiary; and no proceeding has been instituted in any such jurisdiction
   revoking, limiting or curtailing, or seeking to revoke, limit or curtail,
   such power and authority or qualification.

      (d)  The Company has an authorized and outstanding capital stock as set
   forth under the heading "Capitalization" in the Prospectus; the issued and
   outstanding shares of Common Stock have been duly authorized and validly
   issued, are fully paid and nonassessable, are duly listed on the American
   Stock Exchange, have been issued in compliance with all federal and state
   securities laws,

                                       3

<PAGE>
 
   were not issued in violation of or subject to any preemptive rights or other
   rights to subscribe for or purchase securities, and conform to the
   description thereof contained in the Prospectus.  All issued and outstanding
   shares of capital stock of each subsidiary of the Company have been duly
   authorized and validly issued and are fully paid and nonassessable.  Except
   as disclosed in or contemplated by the Prospectus and the financial
   statements of the Company, and the related notes thereto, included or
   incorporated by reference in the Prospectus, neither the Company nor any
   subsidiary has outstanding any options to purchase, or any preemptive rights
   or other rights to subscribe for or to purchase, any securities or
   obligations convertible into, or any contracts or commitments to issue or
   sell, shares of its capital stock or any such options, rights, convertible
   securities or obligations.

      (e)  The Common Shares to be sold by the Company have been duly authorized
   and, when issued, delivered and paid for in the manner set forth in this
   Agreement, will be duly authorized, validly issued, fully paid and
   nonassessable, and will conform to the description thereof contained in the
   Prospectus.  No preemptive rights or other rights to subscribe for or
   purchase exist with respect to the issuance and sale of the Common Shares by
   the Company pursuant to this Agreement.  No stockholder of the Company has
   any right which has not been waived to require the Company to register the
   sale of any shares owned by such stockholder under the Act in the public
   offering contemplated by this Agreement.  No further approval or authority of
   the stockholders or the Board of Directors of the Company will be required
   for the issuance and sale of the Common Shares to be sold by the Company as
   contemplated herein.

      (f)  The Company has full legal right, power and authority to enter into
   this Agreement and perform the transactions contemplated hereby.  This
   Agreement has been duly authorized, executed and delivered by the Company and
   constitutes a valid and binding obligation of the Company in accordance with
   its terms.  The making and performance of this Agreement by the Company and
   the consummation of the transactions herein contemplated will not violate any
   provisions of the certificate of incorporation or bylaws, or other
   organizational documents, of the Company or any of its subsidiaries, and will
   not conflict with, result in the breach or violation of, or constitute,
   either by itself or upon notice or the passage of time or both, a default
   under any material agreement, mortgage, deed of trust, lease, franchise,
   license, indenture, permit or other instrument to which the Company or any of
   its subsidiaries is a party or by which the Company or any of its
   subsidiaries or any of its respective properties may be bound or affected,
   any statute or any authorization, judgment, decree, order, rule or regulation
   of any court or any regulatory body, administrative agency or other
   governmental body applicable to the Company or any of its subsidiaries or any
   of their respective properties.  No consent, approval, authorization or other
   order of any court, regulatory body, administrative agency or other
   governmental body is required for the execution and delivery of this
   Agreement or the consummation of the transactions contemplated by this
   Agreement, except for compliance with the Act, the Blue Sky and state
   securities laws of jurisdictions of the United States and provincial
   securities laws of jurisdictions of Canada (collectively, "Blue Sky Laws")
   applicable to the public offering of the Common Shares by the several
   Underwriters and the clearance of such offering with the National Association
   of Securities Dealers, Inc. (the "NASD").

      (g)  KPMG Peat Marwick LLP, who have expressed their opinion with respect
   to the financial statements incorporated by reference in the Prospectus and
   the Registration Statement, are independent accountants as required by the
   Act and the Rules and Regulations.

      (h)  The consolidated financial statements of the Company and its
   subsidiaries, and the related notes thereto, incorporated by reference in the
   Registration Statement and the Prospectus present fairly the financial
   position of the Company and its subsidiaries as of the respective dates of
   such

                                       4

<PAGE>
 
   financial statements, and the results of operations and changes in financial
   position of the Company and its subsidiaries for the respective periods
   covered thereby.  Such statements and related notes have been prepared in
   accordance with generally accepted accounting principles applied on a
   consistent basis as certified by KPMG Peat Marwick LLP.  No other financial
   statements or schedules are required to be included or incorporated by
   reference in the Registration Statement.  The selected financial data set
   forth in the Prospectus under the captions "Capitalization" and "Selected
   Financial Data" fairly present the information set forth therein on the basis
   stated in the Registration Statement.

      (i)  Except as disclosed in the Prospectus, and except as to defaults
   which individually or in the aggregate would not be material to the Company,
   neither the Company nor any of its subsidiaries is in violation or default of
   any provision of its certificate of incorporation or bylaws, or other
   organizational documents, or is in breach of or default with respect to any
   provision of any agreement, judgment, decree, order, mortgage, deed of trust,
   lease, franchise, license, indenture, permit or other instrument to which it
   is a party or by which it or any of its properties are bound; and there does
   not exist any state of facts which constitutes an event of default on the
   part of the Company or any such subsidiary as defined in such documents or
   which, with notice or lapse of time or both, would constitute such an event
   of default.

      (j)  There are no contracts or other documents required to be described in
   the Registration Statement or to be filed as exhibits to the Registration
   Statement by the Act or by the Rules and Regulations which have not been
   described or filed as required.  The descriptions of contracts in the
   Prospectus are accurate and complete; all such contracts are in full force
   and effect on the date hereof; and neither the Company nor any of its
   subsidiaries, nor to the best of the Company's knowledge, any other party is
   in breach of or default under any of such contracts.

      (k)  There are no legal or governmental actions, suits or proceedings
   pending or, to the best of the Company's knowledge, threatened to which the
   Company or any of its subsidiaries is or may be a party or of which property
   owned or leased by the Company or any of its subsidiaries is or may be the
   subject, or related to environmental or discrimination matters, which
   actions, suits or proceedings might, individually or in the aggregate,
   prevent or adversely affect the transactions contemplated by this Agreement
   or have a material adverse effect on the condition (financial or otherwise),
   properties, business, results of operations or prospects of the Company and
   its subsidiaries, taken as a whole (a "Material Adverse Effect"); and no
   labor disturbance by the employees of the Company or any of its subsidiaries
   exists or, to the best of the Company's knowledge, is imminent which might be
   expected to have a Material Adverse Effect.  Neither the Company nor any of
   its subsidiaries is a party or subject to the provisions of any material
   injunction, judgment, decree or order of any court, regulatory body,
   administrative agency or other governmental body.

      (l)  The Company or the applicable subsidiary has good and marketable
   title to all the properties and assets reflected as owned in the financial
   statements hereinabove described (or elsewhere in the Prospectus), subject to
   no lien, mortgage, pledge, charge or encumbrance of any kind except (i)
   those, if any, reflected in such financial statements (or elsewhere in the
   Prospectus), or (ii) those which are not material in amount and do not
   adversely affect the use made and proposed to be made of such property by the
   Company and its subsidiaries. The Company or the applicable subsidiary holds
   its leased properties under valid and binding leases, with such exceptions as
   are not materially significant in relation to the business of the Company.
   Except as disclosed in the Prospectus, the Company owns or leases all such
   properties as are necessary to its operations as now conducted or as proposed
   to be conducted.

                                       5

<PAGE>
 
      (m)  Since the respective dates as of which information is given in the
   Registration Statement and Prospectus, and except as described in or
   specifically contemplated by the Prospectus: (i) the Company and its
   subsidiaries have not incurred any material liabilities or obligations,
   indirect, direct or contingent, or entered into any material agreement or
   other transaction which is not in the ordinary course of business or which
   could result in a material reduction in the future earnings of the Company
   and its subsidiaries, taken as a whole; (ii) the Company and its subsidiaries
   have not sustained any material loss or interference with their respective
   businesses or properties from fire, flood, windstorm, accident or other
   calamity, whether or not covered by insurance; (iii) the Company has not paid
   or declared any dividends or other distributions with respect to its capital
   stock and the Company and its subsidiaries are not in default in the payment
   of principal or interest on any outstanding debt obligations; (iv) there has
   not been any change in the capital stock (other than upon the sale of the
   Common Shares hereunder or upon the exercise of outstanding stock options) or
   indebtedness material to the Company and its subsidiaries, taken as a whole
   (other than in the ordinary course of business); and (v) there has not been
   any material adverse change in the condition (financial or otherwise),
   business, properties, results of operations or prospects of the Company and
   its subsidiaries, taken as a whole.

      (n)  Except as disclosed in the Prospectus, (i) the Company and its
   subsidiaries own or have the right to use (as currently used), free and clear
   of all material liens, charges, claims, encumbrances, pledges, security
   interests, defects or other like material restrictions of any kind
   whatsoever, all patents, patent applications, trademarks, service marks,
   trade names, mask works and copyrights, any licenses and rights to the
   foregoing, and any registrations of any of the foregoing, used in the conduct
   of their respective businesses as previously or presently conducted, or as
   proposed to be conducted (collectively, "Intellectual Property Rights"),
   without infringing upon or otherwise acting adversely to the right of any
   person or entity under or with respect to any of the foregoing, (ii) the
   invalidity of any patent, the expiration of any registration of any
   Intellectual Property Rights or any other loss of Intellectual Property
   Rights would not have a Material Adverse Effect, (iii) there is no claim
   being made or, to the best of the Company's knowledge, threatened against the
   Company or any of its subsidiaries regarding any of the Intellectual Property
   Rights that could have a Material Adverse Effect, and (iv) neither the
   Company nor any of its subsidiaries is obligated or under any liability
   whatsoever to make any payments by way of royalties, fees or otherwise to any
   owner or licensee of, or other claimant to, any patent, trademark, service
   mark, trade name, copyright, know-how, technology or other intangible asset,
   with respect to the use thereof or in connection with the conduct of its
   business or otherwise.  The Company and each of its subsidiaries have the
   unrestricted right to use (as currently used) all trade secrets, know-how
   (including all other unpatented and unpatentable proprietary or confidential
   information, systems or procedures), inventions, designs, processes, works of
   authorship, computer programs, and technical data and information required
   for or material to the development, production, operation and sale of all
   services and products sold or proposed to be sold thereby, free and clear of,
   and without violating, any material right, lien or claim of others, including
   former employers of their respective employees.

      (o)  The Company has not been advised, and has no reason to believe, that
   either it or any of its subsidiaries is not conducting business in compliance
   with all applicable laws, rules and regulations of the jurisdictions in which
   it is conducting business, including all applicable local, state and federal
   environmental laws and regulations, except where failure to be so in
   compliance would not have a Material Adverse Effect.

      (p)  The Company and its subsidiaries have filed all necessary federal,
   state and foreign income and franchise tax returns and have paid all taxes
   shown as due thereon; and the Company

                                       6

<PAGE>
 
   has no knowledge of any tax deficiency which has been or might be asserted or
   threatened against the Company or its subsidiaries which could have a
   Material Adverse Effect.

      (q)  The Company is not an "investment company" within the meaning of the
   Investment Company Act of 1940, as amended.

      (r)  The Company has not distributed and will not distribute prior to the
   First Closing Date any offering material in connection with the offering and
   sale of the Common Shares other than the Prospectus, the Registration
   Statement and the other materials permitted by the Act.

      (s)  Each of the Company and its subsidiaries maintains insurance of the
   types and in the amounts generally deemed adequate for its business,
   including insurance covering real and personal property owned or leased by
   the Company and its subsidiaries against theft, damage, destruction, acts of
   vandalism and all other risks customarily insured against, all of which
   insurance is in full force and effect.

      (t)  Neither the Company nor any of its subsidiaries has at any time
   during the last five years (i) made any unlawful contribution to any
   candidate for foreign office, or failed to disclose fully any contribution in
   violation of law, or (ii) made any payment to any federal or state
   governmental officer or official, or other person charged with similar public
   or quasi-public duties, other than payments required or permitted by the laws
   of the United States or any jurisdiction thereof.

      (u)  The Company has not taken and will not take, directly or indirectly,
   any action designed to or that might be reasonably expected to cause or
   result in stabilization or manipulation of the price of the Common Stock to
   facilitate the sale or resale of the Common Shares.

   SECTION 3.  REPRESENTATIONS AND WARRANTIES OF THE UNDERWRITERS.  The
Representatives, on behalf of the several Underwriters, represent and warrant to
the Company that the information set forth in (i) the last paragraph of the
cover page of the Prospectus and (ii) the second paragraph under "Underwriting"
in the Prospectus was furnished to the Company by and on behalf of the
Underwriters for use in connection with the preparation of the Registration
Statement and the Prospectus and is correct in all material respects.  The
Representatives represent and warrant that they have been authorized by each of
the other Underwriters as the Representatives to enter into this Agreement on
its behalf and to act for it in the manner herein provided.

   SECTION 4.  PURCHASE, SALE AND DELIVERY OF COMMON SHARES.  On the basis of
the representations, warranties and agreements herein contained, but subject to
the terms and conditions herein set forth, the Company agrees to issue and sell
the Firm Common Shares to the Underwriters.  Each of the Underwriters agrees,
severally and not jointly, to purchase from the Company the number of Firm
Common Shares set forth opposite the name of such Underwriter in Schedule A
hereto.  The purchase price per share to be paid by the several Underwriters to
the Company shall be equal to the initial price to the public per share less an
amount per share equal to the per share underwriting discount.  The initial
price to the public, which shall be a fixed price, and the underwriting discount
will be determined by separate agreement between the Company and the
Underwriters in substantially the form set forth as Schedule B hereto.  Such
initial price shall not be higher than the last sale price of the  Common Stock
reported on the American Stock Exchange immediately prior to such determination.

   Delivery of certificates for the Firm Common Shares to be purchased by the
Underwriters shall be made at the offices of Montgomery Securities, 600
Montgomery Street, San Francisco, California and payment therefor shall be made
at the offices of Brown, Rudnick, Freed & Gesmer, One Financial

                                       7

<PAGE>
 
Center, Boston, Massachusetts (or such other place as may be agreed upon by the
Company and the Representatives), at such time and date, not later than the
third (or, if the Firm Common Shares are priced, as contemplated by Rule 15c6-
1(c) of the Exchange Act, after 4:30 P.M., Washington, D.C. time, the fourth)
full business day following the first date that any of the Common Shares are
released by the Representatives for sale to the public, as the Representatives
shall designate by at least 48 hours prior notice to the Company (or at such
other time and date, not later than one week after such third or fourth, as the
case may be, full business day as may be agreed upon by the Company and the
Representatives) (the "First Closing Date"); provided, however, that if the
Prospectus is at any time prior to the First Closing Date recirculated to the
public, the First Closing Date shall occur upon the later of the third or
fourth, as the case may be, full business day following the first date that any
of the Common Shares are released by the Representatives for sale to the public
or the date that is 48 hours after the date that the Prospectus has been so
recirculated.

   Delivery of certificates for the Firm Common Shares shall be made by or on
behalf of the Company to the Representatives, for the respective accounts of the
Underwriters against payment by the Representatives, for the accounts of the
several Underwriters, of the purchase price therefor by certified or official
bank checks payable in next day funds to the order of the Company.  The
certificates for the Firm Common Shares shall be registered in such names and
denominations as the Representatives shall have requested at least two full
business days prior to the First Closing Date, and shall be made available for
checking and packaging on the business day preceding the First Closing Date at a
location in New York, New York, as may be designated by the Representatives.
Time shall be of the essence, and delivery at the time and place specified in
this Agreement is a further condition to the obligations of the Underwriters.

   In addition, on the basis of the representations, warranties and agreements
herein contained, but subject to the terms and conditions herein set forth, the
Company hereby grants an option to the several Underwriters to purchase,
severally and not jointly, up to an aggregate of 300,000 Optional Common Shares
at the purchase price per share to be paid for the Firm Common Shares, for use
solely in covering any over-allotments made by the Representatives for the
account of the Underwriters in the sale and distribution of the Firm Common
Shares.  The option granted hereunder may be exercised at any time (but not more
than once) within thirty days after the first date that any of the Common Shares
are released by the Representatives for sale to the public, upon notice by the
Representatives to the Company setting forth the aggregate number of Optional
Common Shares as to which the Underwriters are exercising the option, the names
and denominations in which the certificates for such shares are to be registered
and the time and place at which such certificates will be delivered.  Such time
of delivery (which may not be earlier than the First Closing Date), being herein
referred to as the "Second Closing Date," shall be determined by the
Representatives, but if at any time other than the First Closing Date shall not
be earlier than three nor later than five full business days after delivery of
such notice of exercise.  The number of Optional Common Shares to be purchased
by each Underwriter shall be determined by multiplying the number of Optional
Common Shares pursuant to such notice of exercise by a fraction, the numerator
of which is the number of Firm Common Shares to be purchased by such Underwriter
as set forth opposite its name in Schedule A hereto and the denominator of which
is 2,000,000 (subject to such adjustments to eliminate any fractional share
purchases as the Representatives in their discretion may make).  Certificates
for the Optional Common Shares will be made available for checking and packaging
on the business day preceding the Second Closing Date at a location in New York,
New York, as may be designated by the Representatives.  The manner of payment
for and delivery of, the Optional Common Shares shall be the same as for the
Firm Common Shares as specified in the two preceding paragraphs.  At any time
before lapse of the option, the Representatives may cancel such option by giving
written notice of such cancellation to the Company.

                                       8

<PAGE>
 
   The Representatives have advised the Company that each Underwriter has
authorized the Representatives to accept delivery of its Common Shares, to make
payment and to receipt therefor.  You, individually and not as the
Representatives of the Underwriters, may (but shall not be obligated to) make
payment for any Common Shares to be purchased by any Underwriter whose funds
shall not have been received by the Representatives by the First Closing Date or
the Second Closing Date, as the case may be, for the account of such
Underwriter, but any such payment shall not relieve such Underwriter from any of
its obligations under this Agreement.

   Subject to the terms and conditions hereof, the Underwriters propose to make
a public offering of their respective portions of the Common Shares as soon
after the effective date of the Registration Statement as in the judgment of the
Representatives is advisable and at the public offering price set forth on the
cover page of and on the terms set forth in the final prospectus, if one is
used, or on the first page of the Term Sheet, if one is used.

   SECTION 5.  COVENANTS OF THE COMPANY.  The Company covenants and agrees that:

      (a)  The Company will use its best efforts to cause the Registration
   Statement and any amendment thereof, if not effective at the time and date
   that this Agreement is executed and delivered by the parties hereto, to
   become effective.  If the Registration Statement has become or becomes
   effective pursuant to Rule 430A of the Rules and Regulations, or the filing
   of the Prospectus or the Term Sheet is otherwise required under Rule 424(b)
   of the Rules and Regulations, the Company will file the Prospectus or the
   Term Sheet, properly completed, pursuant to the applicable paragraph of Rule
   424(b) of the Rules and Regulations within the time period prescribed and
   will provide evidence satisfactory to the Representatives of such timely
   filing.  The Company will promptly advise the Representatives in writing (i)
   of the receipt of any comments of the Commission, (ii) of any request of the
   Commission for amendment of or supplement to the Registration Statement
   (either before or after it becomes effective), any Preliminary Prospectus or
   the Prospectus or for additional information, (iii) when the Registration
   Statement shall have become effective and (iv) of the issuance by the
   Commission of any stop order suspending the effectiveness of the Registration
   Statement or of the institution of any proceedings for that purpose.  If the
   Commission shall enter any such stop order at any time, the Company will use
   its best efforts to obtain the lifting of such order at the earliest possible
   moment.  The Company will not file any amendment or supplement to the
   Registration Statement (either before or after it becomes effective), any
   Preliminary Prospectus, the Term Sheet or the Prospectus of which the
   Representatives have not been furnished with a copy a reasonable time prior
   to such filing or to which the Representatives reasonably object or which is
   not in compliance with the Act and the Rules and Regulations.

      (b)  The Company will prepare and file with the Commission, promptly upon
   the Representatives' reasonable request, any amendments or supplements to the
   Registration Statement or the Prospectus which in the Representatives'
   reasonable judgment may be necessary or advisable to enable the several
   Underwriters to continue the distribution of the Common Shares and will use
   its best efforts to cause the same to become effective as promptly as
   possible.  The Company will fully and completely comply with the provisions
   of Rule 430A of the Rules and Regulations with respect to information omitted
   from the Registration Statement in reliance upon such Rule.

      (c)  If at any time within the nine-month period referred to in Section
   10(a)(3) of the Act during which a prospectus relating to the Common Shares
   is required to be delivered under the Act any event occurs, as a result of
   which the Prospectus, including any amendments or supplements, would include
   an untrue statement of a material fact, or omit to state any material fact
   required to be stated therein or necessary to make the statements therein not
   misleading, or if it is necessary at

                                       9

<PAGE>
 
   any time to amend the Prospectus, including any amendments or supplements, to
   comply with the Act or the Rules and Regulations, the Company will promptly
   advise the Representatives thereof and will promptly prepare and file with
   the Commission, at its own expense, an amendment or supplement which will
   correct such statement or omission or an amendment or supplement which will
   effect such compliance and will use its best efforts to cause the same to
   become effective as soon as possible; and, in case any Underwriter is
   required to deliver a prospectus after such nine-month period, the Company
   upon request, but at the expense of such Underwriter, will promptly prepare
   such amendment or amendments to the Registration Statement and such
   Prospectus or Prospectuses as may be necessary to permit compliance with the
   requirements of Section 10(a)(3) of the Act.

      (d)  As soon as practicable, but not later than 45 days after the end of
   the first quarter ending after one year following the "effective date of the
   Registration Statement" (as defined in Rule 158(c) of the Rules and
   Regulations), the Company will make generally available to its security
   holders an earnings statement (which need not be audited) covering a period
   of 12 consecutive months beginning after the effective date of the
   Registration Statement which will satisfy the provisions of the last
   paragraph of Section 11(a) of the Act.

      (e)  During such period as a prospectus is required by law to be delivered
   in connection with sales by an Underwriter or dealer, the Company, at its
   expense, but only for the nine-month period referred to in Section 10(a)(3)
   of the Act, will furnish to the Representatives or mail to the
   Representatives' order copies of the Registration Statement, the Prospectus
   (including the Term Sheet), the Preliminary Prospectus and all amendments and
   supplements to any such documents in each case as soon as available and in
   such quantities as the Representatives may reasonably request, for the
   purposes contemplated by the Act.

      (f)  The Company shall cooperate with the Representatives and Foley, Hoag
   & Eliot in order to qualify or register the Common Shares for sale under (or
   obtain exemptions from the application of) the Blue Sky Laws of such
   jurisdictions of the United States and Canada as the Representatives
   reasonably designate, will comply with such laws and will continue such
   qualifications, registrations and exemptions in effect so long as reasonably
   required for the distribution of the Common Shares. The Company shall not be
   required to qualify as a foreign corporation or to file a general consent to
   service of process in any such jurisdiction where it is not presently
   qualified or where it would be subject to taxation as a foreign corporation.
   The Company will advise the Representatives promptly of the suspension of the
   qualification or registration of (or any such exemption relating to) the
   Common Shares for offering, sale or trading in any jurisdiction or any
   initiation or threat of any proceeding for any such purpose, and in the event
   of the issuance of any order suspending such qualification, registration or
   exemption, the Company, with the Representatives' cooperation, will use its
   best efforts to obtain the withdrawal thereof.

      (g)  During the period of five years hereafter, the Company will furnish
   to the Representatives and, upon request of the Representatives, to each of
   the other Underwriters: (i) as soon as practicable after the end of each
   fiscal year, copies of the Annual Report of the Company containing the
   balance sheet of the Company as of the close of such fiscal year and
   statements of income, stockholders' equity and cash flows for the year then
   ended and the opinion thereon of the Company's independent accountants; (ii)
   as soon as practicable after the filing thereof, copies of each proxy
   statement, Annual Report on Form 10-K, Quarterly Report on Form 10-Q, Current
   Report on Form 8-K or other report filed by the Company with the Commission,
   the American Stock Exchange or any other securities exchange, or any 
   over-the-counter market; and (iii) as soon

                                       10

<PAGE>
 
   as available, copies of any report or communication of the Company mailed
   generally to holders of Common Stock.

      (h)  During the period of ninety days after the date of the Prospectus,
   without the prior written consent of Montgomery Securities (which consent may
   be withheld at the sole discretion of Montgomery Securities), the Company
   will not issue, offer, sell, grant options to purchase or otherwise dispose
   of any of the Company's equity securities or any other securities convertible
   into or exchangeable with its Common Stock or other equity security, other
   than (i) the issuance and sale of shares of Common Stock pursuant to
   outstanding stock options and warrants disclosed in the Prospectus, (ii) the
   issuance of options under the Alpha Industries, Inc. 1986 Long-Term Incentive
   Plan and the Alpha Industries, Inc. 1994 Non-Qualified Stock Option Plan for
   Non-Employee Directors, each as amended on the date hereof, and (iii) the
   issuance of shares of Common Stock under the Alpha Industries, Inc. Employee
   Stock Purchase Plan and the Alpha Industries, Inc. Savings and Retirement
   Plan, each as amended on the date hereof.

      (i)  The Company will apply the net proceeds of the sale of the Common
   Shares sold by it substantially in accordance with its statements under the
   caption "Use of Proceeds" in the Prospectus.

      (j)  The Company will use its best efforts to qualify or register its
   Common Stock for sale in non-issuer transactions under (or obtain exemptions
   from the application of) the Blue Sky Laws of the State of California (and
   thereby permit market making transactions and secondary trading in the Common
   Stock in California), will comply with such Blue Sky Laws and will continue
   such qualifications, registrations and exemptions in effect for a period of
   five years after the date hereof.

      (k)  The Company will use its best efforts to list the Firm Common Shares
   and, to the extent issued, the Optional Common Shares on the American Stock
   Exchange.

The Representatives may, in their sole discretion, waive in writing the
performance by the Company of any one or more of the foregoing covenants or
extend the time for the performance of any of the foregoing covenants.

   SECTION 6.  PAYMENT OF EXPENSES.  Whether or not the transactions
contemplated hereunder are consummated or this Agreement becomes effective or is
terminated, the Company agrees to pay all costs, fees and expenses incurred in
connection with the performance of its obligations hereunder and in connection
with the transactions contemplated hereby, including without limiting the
generality of the foregoing, (i) all expenses incident to the issuance and
delivery of the Common Shares (including all printing and engraving costs), (ii)
all fees and expenses of the registrar and transfer agent of the Common Stock,
(iii) all necessary issue, transfer and other stamp taxes in connection with the
issuance and sale of the Common Shares to the Underwriters, (iv) all fees and
expenses of the Company's counsel and the Company's independent accountants, (v)
all costs and expenses incurred in connection with the preparation, printing,
filing, shipping and distribution of the Registration Statement, each
Preliminary Prospectus and the Prospectus (including the Term Sheet and all
exhibits and financial statements) and all amendments and supplements provided
for herein, this Agreement, the Montgomery Securities Master Agreement Among
Underwriters, the Montgomery Securities Master Selected Dealers Agreement, any
Underwriters' Questionnaire and any Underwriters' Power of Attorney, (vi) all
filing fees, reasonable attorneys' fees and expenses incurred by the Company or
the Underwriters in connection with qualifying or registering (or obtaining
exemptions from the qualification or registration of) all or any part of the
Common Shares for offer and sale under Blue Sky Laws, including all costs and
expenses incurred in connection with the preparation, printing, filing, shipping
and distribution of all preliminary and

                                       11

<PAGE>
 
supplemental memoranda relating to Blue Sky Laws, (vii) the filing fee of the
NASD and the listing fee of the American Stock Exchange, and (viii) all other
fees, costs and expenses referred to in Item 14 of the Registration Statement.
Except as provided in this Section 6 and Sections 8 and 10, the Underwriters
shall pay all of their own expenses, including the fees and disbursements of
their counsel (excluding those relating to qualification, registration or
exemption under the Blue Sky Laws and the Blue Sky memorandum referred to
above).

   SECTION 7.  CONDITIONS OF THE OBLIGATIONS OF UNDERWRITERS.  The obligations
of the several Underwriters to purchase and pay for the Firm Common Shares on
the First Closing Date and the Optional Common Shares on the Second Closing Date
shall be subject to the accuracy of the representations and warranties on the
part of the Company herein set forth as of the date hereof and as of the First
Closing Date or the Second Closing Date, as the case may be, to the accuracy of
the statements of Company officers made pursuant to the provisions hereof, to
the performance by the Company of its obligations hereunder, and to the
following additional conditions:

      (a)  The Registration Statement shall have become effective not later than
   5 P.M. (or, in the case of a registration statement filed pursuant to Rule
   462(b) of the Rules and Regulations relating to the Common Shares, not later
   than 10 A.M.), Washington, D.C. time, on the date of this Agreement, or at
   such later time as shall have been consented to by the Representatives; if
   the filing of the Prospectus, or any supplement thereto, is required pursuant
   to Rule 424(b) of the Rules and Regulations, the Prospectus shall have been
   filed in the manner and within the time period required by Rule 424(b) of the
   Rules and Regulations; and prior to such Closing Date, no stop order
   suspending the effectiveness of the Registration Statement shall have been
   issued and no proceedings for that purpose shall have been instituted or
   shall be pending or, to the knowledge of the Company or the Representatives,
   shall be contemplated by the Commission; and any request of the Commission
   for inclusion of additional information in the Registration Statement, or
   otherwise, shall have been complied with to the Representatives'
   satisfaction.

      (b)  The Representatives shall be satisfied that since the respective
   dates as of which information is given in the Registration Statement and
   Prospectus, (i) there shall not have been any change in the capital stock of
   the Company or any of its subsidiaries, other than (A) pursuant to the
   exercise of outstanding options and warrants disclosed in the Prospectus, (B)
   the issuance of Common Stock pursuant to options issued under the Alpha
   Industries, Inc. 1986 Long-Term Incentive Plan or the Alpha Industries, Inc.
   1994 Non-Qualified Stock Option Plan for Non-Employee Directors, each as
   amended on the date hereof, or (C) shares of Common Stock issued under the
   Alpha Industries, Inc. Employee Stock Purchase Plan and the Alpha Industries,
   Inc. Savings and Retirement Plan, each as amended on the date hereof; (ii)
   there shall not have been any change in the indebtedness (other than in the
   ordinary course of business) of the Company or any of its subsidiaries that
   is material to the Company and its subsidiaries, taken as a whole; (iii)
   except as set forth or contemplated by the Registration Statement or the
   Prospectus, no material agreement or other transaction shall have been
   entered into by the Company or any of its subsidiaries, which is not in the
   ordinary course of business or which could result in a material reduction in
   the future earnings of the Company and its subsidiaries, taken as a whole;
   (iv) no loss or damage (whether or not insured) to the property of the
   Company or any of its subsidiaries shall have been sustained which has or
   could have a Material Adverse Effect, (v) no legal or governmental action,
   suit or proceeding affecting the Company or any of its subsidiaries which is
   material to the Company and its subsidiaries or which affects or may affect
   the transactions contemplated by this Agreement shall have been instituted or
   threatened and (vi) there shall not have been any material change in the
   condition (financial or otherwise), business, management, results of
   operations or prospects of the Company and its subsidiaries, taken as a
   whole, which makes it impractical or inadvisable in the

                                       12

<PAGE>
 
   judgment of the Representatives to proceed with the public offering or
   purchase the Common Shares as contemplated hereby.

      (c) There shall have been furnished to the Representatives, on each
   Closing Date, in form and substance satisfactory to the Representatives,
   except as otherwise expressly provided below:

          (i)  An opinion of Brown, Rudnick, Freed & Gesmer, counsel for the
      Company, addressed to the Underwriters and dated the First Closing Date or
      the Second Closing Date, as the case may be, to the effect that:

               (1)  Each of the Company and its subsidiaries organized under the
          laws of states of the United States (the "U.S. Subsidiaries") has been
          duly incorporated and is validly existing as a corporation in good
          standing under the laws of its jurisdiction of incorporation, is duly
          qualified to do business as a foreign corporation and is in good
          standing in each of the jurisdictions listed therein, and has full
          corporate power and authority to own its properties and conduct its
          business as described in the Registration Statement.

               (2)  The authorized, issued and outstanding capital stock of the
          Company is as set forth under the caption "Capitalization" in the
          Prospectus; all necessary and proper corporate proceedings have been
          taken in order to authorize validly such authorized Common Stock; all
          outstanding shares of Common Stock have been duly and validly issued,
          are fully paid and nonassessable, were not issued in violation of or
          subject to any preemptive rights or other rights to subscribe for or
          purchase any securities, and conform to the description thereof
          contained in the Prospectus; without limiting the foregoing, there are
          no preemptive or other rights to subscribe for or purchase any of the
          Common Shares.

               (3)  All of the issued and outstanding shares of the U.S.
          Subsidiaries of the Company have been duly and validly authorized and
          issued, are fully paid and nonassessable and, to the best of such
          counsel's knowledge, are owned beneficially by the Company free and
          clear of all liens, encumbrances, equities, claims, security
          interests, voting trusts or other defects of title whatsoever.

               (4)  The certificates evidencing the Common Shares to be
          delivered hereunder are in due and proper form under law, and when
          duly countersigned by the Company's transfer agent and registrar, and
          delivered to the Representatives or upon the Representatives' order
          against payment of the agreed consideration therefor in accordance
          with the provisions of this Agreement, the Common Shares represented
          thereby will be duly authorized and validly issued, fully paid and
          nonassessable, will not have been issued in violation of or subject to
          any preemptive rights or other rights to subscribe for or purchase
          securities, and will conform in all respects to the description
          thereof contained in the Prospectus.

               (5)  To the best of such counsel's knowledge, there are no
          outstanding options, warrants or other rights calling for the issuance
          of, and no commitments, plans or arrangements to issue, any shares of
          capital stock of the Company or any security convertible into or
          exchangeable for capital stock of the Company, except (a) for options
          granted under the Alpha Industries, Inc. 1986 Long-Term Incentive Plan
          and the Alpha Industries, Inc. 1994 Non-Qualified Stock Option Plan
          for Non-Employee Directors,

                                       13

<PAGE>
 
          (C) as contemplated by the Alpha Industries, Inc. Employee Stock
          Purchase Plan, and (c) as disclosed in or specifically contemplated by
          the Prospectus.

               (6)  The Registration Statement has become effective under the
          Act, and, to the best of such counsel's knowledge, no stop order
          suspending the effectiveness of the Registration Statement or
          preventing the use of the Prospectus has been issued and no
          proceedings for that purpose have been instituted or are pending or
          contemplated by the Commission; any required filing of the Prospectus
          and any supplement thereto pursuant to Rule 424(b) of the Rules and
          Regulations has been made in the manner and within the time period
          required by such Rule 424(b).

               (7)  The Registration Statement, the Prospectus and each
          amendment or supplement thereto (except for the financial statements
          and schedules and financial and statistical data included therein, as
          to which such counsel need express no opinion) comply as to form in
          all material respects with the requirements of the Act and the Rules
          and Regulations. To the best of such counsel's knowledge, there are no
          franchises, leases, contracts, agreements or documents of a character
          required to be disclosed in the Registration Statement or Prospectus
          or to be filed as exhibits to the Registration Statement which are not
          disclosed or filed, as required. To the best of such counsel's
          knowledge, there are no legal or governmental actions, suits or
          proceedings pending or threatened against the Company which are
          required to be described in the Prospectus which are not described as
          required.

               (8)  The documents incorporated by reference in the Prospectus
          (except for any financial statements and schedules and financial and
          statistical data included in such documents, as to which such counsel
          need express no opinion), when they were filed with the Commission,
          complied as to form in all material respects with the requirements of
          the Exchange Act and the rules and regulations of the Commission
          thereunder.

               (9)  The Company has the corporate power and authority to enter
          into this Agreement and to sell and deliver the Common Shares to the
          several Underwriters; this Agreement has been duly and validly
          authorized by all necessary corporate action by the Company, has been
          duly and validly executed and delivered by and on behalf of the
          Company, and is a valid and binding agreement of the Company in
          accordance with its terms; and no approval, authorization, order,
          consent, registration, filing, qualification, license or permit of or
          with any court, regulatory, administrative or other governmental body
          is required for the execution and delivery of this Agreement by the
          Company or the consummation of the transactions contemplated by this
          Agreement, except such as have been obtained and are in full force and
          effect under the Act and such as may be required under applicable Blue
          Sky Laws in connection with the purchase and distribution of the
          Common Shares by the Underwriters and the clearance of such offering
          with the NASD.

               (10) The execution and performance of this Agreement and the
          consummation of the transactions herein contemplated will not (a)
          conflict with, result in the breach of, or constitute, either by
          itself or upon notice or the passage of time or both, a default under,
          any of the agreements and other documents constituting exhibits to the
          Registration Statement, (b) violate any of the provisions of the
          certificate of incorporation or bylaws, or other organizational
          documents, of the Company or any of the U.S. Subsidiaries or (c) to
          the best of such counsel's knowledge, violate any federal or
          Massachusetts statute, rule or regulation or any judgment, decree or
          order of any court or governmental body

                                       14

<PAGE>
 
          having jurisdiction over the Company or any of the U.S. Subsidiaries
          or any property of the Company or any of the U.S. Subsidiaries.

               (11) Neither the Company nor any of the U.S. Subsidiaries is in
          violation of its certificate of incorporation or bylaws, or other
          organizational documents, except where such default would not
          materially adversely affect the Company and the U.S. Subsidiaries,
          taken as a whole.

               (12) To the best of such counsel's knowledge, no holders of
          securities of the Company have rights which have not been waived to
          the registration of shares of Common Stock or other securities,
          because of the filing of the Registration Statement by the Company or
          the offering contemplated hereby.

      In rendering such opinion, such counsel may rely as to matters of fact on
      certificates of officers of the Company and the U.S. Subsidiaries and of
      governmental officials, in which case their opinion is to state that they
      are so doing and copies of said certificates are to be attached to the
      opinion.  Such counsel shall also include a statement, satisfactory in
      form and substance to you and to Foley, Hoag & Eliot, counsel for the
      Underwriters, to the effect that nothing has come to such counsel's
      attention that would lead such counsel to believe that (a) at the
      effective date of the Registration Statement, the Registration Statement
      contained any untrue statement of a material fact or omitted to state a
      material fact required to be stated therein or necessary [in order] to
      make the statements therein not misleading or (b) either at the date
      thereof or at the applicable Closing Date, the Prospectus contained or
      contains any untrue statement of a material fact or omits to state a
      material fact required to be stated therein or necessary to make the
      statements therein, in the light of the circumstances under which they
      were made, not misleading.

          (ii)     An opinion of counsel for Alpha Industries GmbH ("Alpha
      Germany"), which counsel shall be reasonably satisfactory to the
      Representatives, addressed to the Underwriters and dated the First Closing
      Date or the Second Closing Date, as the case may be, to the effect that:

               (1)  Alpha Germany has been duly incorporated and is validly
          existing as a corporation in good standing under the laws of Germany.
          Alpha Germany has the corporate power and authority to carry on its
          business in accordance with its charter or by-laws, or other
          organizational documents.

               (2)  All of the issued and outstanding shares of Alpha Germany
          have been duly and validly authorized and issued and are fully paid
          and are owned of record by the Company, to the knowledge of such
          counsel, free and clear of all liens, encumbrances, equities, claims,
          security interests, voting trusts or other defects of title
          whatsoever.

               (3)  Such counsel have not been consulted in connection with any
          pending or threatened material legal or governmental actions, suits or
          proceedings to which Alpha Germany is a party or of which any property
          of Alpha Germany is the subject.

               (4)  Alpha Germany is not in violation of its charter or by-laws,
          or other organizational documents.

                                       15

<PAGE>
 
      In rendering such opinion, such counsel may rely as to matters of fact on
      certificates of officers of Alpha Germany and of governmental officials,
      in which case their opinion is to state that they are so doing and that
      copies of said certificates are attached to the opinion.

          (iii)  An opinion of counsel for Alpha Industries Limited ("Alpha
      UK"), which counsel shall be reasonably satisfactory to the
      Representatives, addressed to the Underwriters and dated the First Closing
      Date or the Second Closing Date, as the case may be, to the effect that:

               (1)  Alpha UK is a company duly incorporated with limited
          liability under the laws of England and is validly existing
          thereunder. As at a specified date within three business days of the
          date of such opinion, Alpha UK was in good standing, which, for
          purposes of such opinion, shall mean that according to a certificate
          received from the Registrar of Companies dated as of such specified
          date Alpha UK has, according to the documents in the custody of the
          Registrar of Companies, been in continuous and unbroken existence
          since the date of its incorporation and there are no documents on the
          file of Alpha UK kept by the Registrar of Companies showing, nor is
          the Registrar of Companies aware of, any proceedings for the winding
          up or liquidation of Alpha UK or that Alpha UK is not still in
          operation.

               (2)  All of the issued shares in the share capital of Alpha UK
          have been duly and validly authorised and issued, and are fully paid
          and nonassessable. For the purposes of such opinion, "nonassessable"
          shall mean that the registered holders of the shares are not liable
          under English law, by virtue of their shareholding, for the payment of
          taxes, duties, wages or other amounts for which Alpha UK is liable.
          All of the issued shares of Alpha UK are owned directly by or on trust
          for the Company, to the knowledge of such counsel free and clear of
          all liens, incumbrances, equities or claims.

               (3)  Such counsel have not been consulted in connection with any
          pending or threatened material legal or governmental actions, suits or
          proceedings to which Alpha UK is a party or of which any property of
          Alpha UK is the subject.

               (4)  Alpha UK is not in violation of its charter or by-laws, or
          other organizational documents.

      In rendering such opinion, such counsel may rely as to matters of fact on
      certificates of officers of Alpha UK and of governmental officials, in
      which case their opinion is to state that they are so doing and that
      copies of said certificates are attached to the opinion.

          (iv)      An opinion of counsel for Trans-Tech Europe SARL ("Trans-
      Tech Europe"), which counsel shall be reasonably satisfactory to the
      Representatives, addressed to the Underwriters and dated the First Closing
      Date or the Second Closing Date, as the case may be, to the effect that:

               (1)  Trans-Tech Europe has been duly incorporated and is validly
          existing under the laws of France as a legal entity in the form of a
          societe anonyme.  Trans-Tech Europe has the corporate power and
          authority to carry on its business in accordance with its Articles of
          Association.

               (2)  All of the issued and outstanding shares of Trans-Tech
          Europe have been duly and validly authorized and issued and are fully
          paid and are owned of record by the

                                       16

<PAGE>
 
          Company (___ shares) and Trans-Tech, Inc. (___ shares), to the
          knowledge of such counsel, free and clear of all liens, encumbrances,
          equities, claims, security interests, voting trusts or other defects
          of title whatsoever.

               (3)  Such counsel have not been consulted in connection with any
          pending or threatened material legal or governmental actions, suits or
          proceedings to which Trans-Tech Europe is a party or of which any
          property of Trans-Tech Europe is the subject.

               (4)  Trans-Tech Europe is not in violation of its charter or by-
          laws, or other organizational documents.

      In rendering such opinion, such counsel may rely as to matters of fact on
      certificates of officers of Trans-Tech Europe and of governmental
      officials, in which case their opinion is to state that they are so doing
      and that copies of said certificates are attached to the opinion.

          (v)  Such opinion or opinions of Foley, Hoag & Eliot, counsel for the
      Underwriters, dated the First Closing Date or the Second Closing Date, as
      the case may be, with respect to the incorporation of the Company, the
      sufficiency of all corporate proceedings and other legal matters relating
      to this Agreement, the validity of the Common Shares, the Registration
      Statement and the Prospectus and other related matters as the
      Representatives may reasonably require, and the Company shall have
      furnished to such counsel such documents and shall have exhibited to them
      such papers and records as they may reasonably request for the purpose of
      enabling them to pass upon such matters.  In connection with such
      opinions, such counsel may rely on representations or certificates of
      officers of the Company and its subsidiaries and of governmental
      officials.

          (vi) A certificate of the Company executed by the President and Chief
      Executive Officer and the Vice President, Chief Financial Officer and
      Treasurer of the Company, dated the First Closing Date or the Second
      Closing Date, as the case may be, to the effect that:

               (1)  The representations and warranties of the Company set forth
          in Section 2 of this Agreement are true and correct as of the date of
          this Agreement and as of the First Closing Date or the Second Closing
          Date, as the case may be, and the Company has complied with all the
          agreements and satisfied all the conditions on its part to be
          performed or satisfied on or prior to such Closing Date.

               (2)  The Commission has not issued any order preventing or
          suspending the use of the Prospectus or any Preliminary Prospectus
          filed as a part of the Registration Statement or any amendment
          thereto; no stop order suspending the effectiveness of the
          Registration Statement has been issued; and to the best of the
          knowledge of the respective signers, no proceedings for that purpose
          have been instituted or are pending or contemplated under the Act.

               (3)  Each of the respective signers of the certificate has
          carefully examined the Registration Statement and the Prospectus; in
          his opinion and to the best of his knowledge, the Registration
          Statement and the Prospectus and any amendments or supplements thereto
          contain all statements required to be stated therein regarding the
          Company and its subsidiaries; and neither the Registration Statement
          nor the Prospectus nor any amendment or supplement thereto includes
          any untrue statement of a material fact

                                       17

<PAGE>
 
          or omits to state any material fact required to be stated therein or
          necessary to make the statements therein not misleading.

               (4)  Since the initial date on which the Registration Statement
          was filed, no agreement, written or oral, transaction or event has
          occurred which should have been set forth in an amendment to the
          Registration Statement or in a supplement to or amendment of any
          prospectus which has not been disclosed in such a supplement or
          amendment.

               (5)  Since the respective dates as of which information is given
          in the Registration Statement and the Prospectus, and except as
          disclosed in or contemplated by the Prospectus, there has not been any
          material adverse change or a development involving a material adverse
          change in the condition (financial or otherwise), business,
          properties, results of operations, management or prospects of the
          Company and its subsidiaries, taken as a whole; and no legal or
          governmental action, suit or proceeding is pending or threatened
          against the Company or any of its subsidiaries which is material to
          the Company and its subsidiaries, taken as a whole, whether or not
          arising from transactions in the ordinary course of business, or which
          may adversely affect the transactions contemplated by this Agreement.
          Since such dates and except as so disclosed, neither the Company nor
          any of its subsidiaries has entered into any agreement or other
          transaction which is not in the ordinary course of business or which
          could result in a material reduction in the future earnings of the
          Company and its subsidiaries, taken as a whole, or incurred any
          material liability or obligation, direct, contingent or indirect, made
          any change in its capital stock, made any material change in its 
          short-term debt or funded debt or repurchased or otherwise acquired
          any of the Company's capital stock; and the Company has not declared
          or paid any dividend, or made any other distribution, upon its
          outstanding capital stock payable to stockholders of record on a date
          prior to the First Closing Date or Second Closing Date.

               (6)  Since the respective dates as of which information is given
          in the Registration Statement and the Prospectus and except as
          disclosed in or contemplated by the Prospectus, the Company and its
          subsidiaries have not sustained a material loss or damage by strike,
          fire, flood, windstorm, accident or other calamity (whether or not
          insured).

               (7)  Each of the respective signers of the certificate has
          carefully reviewed the requests for documents and other records
          submitted by Foley, Hoag & Eliot in connection with the public
          offering and sale of the Common Shares. The agreements, documents,
          records, instruments and other information supplied in response to
          such requests were when so supplied, and are as of the date hereof,
          accurate and complete in all material respects and represent all of
          the material agreements, documents, records, instruments and other
          information relating to the items called for by such requests.

          (vii) On the date before this Agreement is executed and also on the
      First Closing Date and the Second Closing Date a letter addressed to the
      Representatives, from KPMG Peat Marwick LLP, independent accountants, the
      first one to be dated the day before the date of this Agreement, the
      second one to be dated the First Closing Date and the third one (in the
      event of a Second Closing) to be dated the Second Closing Date, each in
      form and substance satisfactory to the Representatives.

                                       18

<PAGE>
 
          (viii)  On or before the First Closing Date, letters from each
      director and executive officer of the Company, in form and substance
      satisfactory to the Representatives, confirming that for a period of
      ninety days after the first date that any of the Common Shares are
      released by the Representatives for sale to the public, such person will
      not directly or indirectly sell or offer to sell or otherwise dispose of
      any shares of Common Stock or any right to acquire such shares without the
      prior written consent of Montgomery Securities, which consent may be
      withheld at the sole discretion of Montgomery Securities.

   All such opinions, certificates, letters and documents shall be in compliance
   with the provisions hereof only if they are satisfactory to the
   Representatives and to Foley, Hoag & Eliot, counsel for the Underwriters.
   The Company shall furnish the Representatives with such manually signed or
   conformed copies of such opinions, certificates, letters and documents as the
   Representatives request.  Any certificate signed by any officer of the
   Company and delivered to the Representatives or to counsel for the
   Underwriters shall be deemed to be a representation and warranty by the
   Company to the Underwriters as to the statements made therein.

If any condition to the Underwriters' obligations hereunder to be satisfied
prior to or at the First Closing Date is not so satisfied, this Agreement at the
Representatives' election will terminate upon notification by the
Representatives to the Company without liability on the part of any Underwriter
or the Company except for the expenses to be paid or reimbursed by the Company
pursuant to Sections 6 and 8 and except to the extent provided in Section 10.

   SECTION 8.  REIMBURSEMENT OF UNDERWRITERS' EXPENSES.  Notwithstanding any
other provisions hereof, if this Agreement shall be terminated by the
Representatives pursuant to Section 7, or if the sale to the Underwriters of
the Common Shares at the First Closing is not consummated because of any
refusal, inability or failure on the part of the Company to perform any
agreement herein or to comply with any provision hereof, the Company agrees to
reimburse the Representatives and the other Underwriters upon demand for all
out-of-pocket expenses that shall have been reasonably incurred by the
Representatives and them in connection with the proposed purchase and the sale
of the Common Shares, including fees and disbursements of counsel, printing
expenses, travel expenses, postage, telegraph charges and telephone charges
relating directly to the offering contemplated by the Prospectus.  Any such
termination shall be without liability of any party to any other party except
that the provisions of this Section 8 and Sections 6 and 10 shall at all
times be effective and shall apply.

   SECTION 9.  EFFECTIVENESS OF REGISTRATION STATEMENT.  The Representatives and
the Company will use their respective best efforts to cause the Registration
Statement to become effective, to prevent the issuance of any stop order
suspending the effectiveness of the Registration Statement and, if such stop
order be issued, to obtain as soon as possible the lifting thereof.

   SECTION 10.  INDEMNIFICATION.

      (a)  The Company agrees to indemnify and hold harmless each Underwriter
   and each person, if any, who controls any Underwriter within the meaning of
   the Act against any losses, claims, damages, liabilities or expenses, joint
   or several, to which such Underwriter or such controlling person may become
   subject, under the Act, the Exchange Act, or other federal or state statutory
   law or regulation, or at common law or otherwise (including in settlement of
   any litigation, if such settlement is effected with the written consent of
   the Company), insofar as such losses, claims, damages, liabilities or
   expenses (or actions in respect thereof as contemplated below) arise out of
   or are based upon any untrue statement or alleged untrue statement of any
   material fact contained in the Registration Statement, any Preliminary
   Prospectus, the Prospectus, or any amendment or

                                       19

<PAGE>
 
   supplement thereto, or arise out of or are based upon the omission or alleged
   omission to state in any of them a material fact required to be stated
   therein or necessary to make the statements in any of them not misleading, or
   arise out of or are based in whole or in part on any inaccuracy in the
   representations and warranties of the Company contained herein or any failure
   of the Company to perform its obligations hereunder or under law; and will
   reimburse each Underwriter and each such controlling person for any legal and
   other expenses as such expenses are reasonably incurred by such Underwriter
   or such controlling person in connection with investigating, defending,
   settling, compromising or paying any such loss, claim, damage, liability,
   expense or action; provided, however, that the Company will not be liable in
   any such case to the extent that any such loss, claim, damage, liability or
   expense arises out of or is based upon an untrue statement or alleged untrue
   statement or omission or alleged omission made in the Registration Statement,
   any Preliminary Prospectus, the Prospectus or any amendment or supplement
   thereto in reliance upon and in conformity with the information furnished to
   the Company pursuant to Section 3.  In addition to its other obligations
   under this Section 10(a), the Company agrees that, as an interim measure
   during the pendency of any claim, action, investigation, inquiry or other
   proceeding arising out of or based upon any statement or omission, or any
   alleged statement or omission, or any inaccuracy in the representations and
   warranties of the Company herein or failure to perform its obligations
   hereunder, all as described in this Section 10(a), it will reimburse each
   Underwriter on a quarterly basis for all reasonable legal or other expenses
   incurred in connection with investigating or defending any such claim,
   action, investigation, inquiry or other proceeding, notwithstanding the
   absence of a judicial determination as to the propriety and  enforceability
   of the Company's obligation to reimburse each Underwriter for such expenses
   and the possibility that such payments might later be held to have been
   improper by a court of competent jurisdiction.  To the extent that any such
   interim reimbursement payment is so held to have been improper, each
   Underwriter shall promptly return it to the Company together with interest,
   compounded daily, determined on the basis of the prime rate (or other
   commercial lending rate for borrowers of the highest credit standing)
   announced from time to time by Bank of America NT&SA, San Francisco,
   California (the "Prime Rate").  Any such interim reimbursement payments which
   are not made to an Underwriter within thirty days of a request for
   reimbursement, shall bear interest at the Prime Rate from the date of such
   request.  This indemnity agreement will be in addition to any liability which
   the Company may otherwise have.

      (b)  Each Underwriter will severally indemnify and hold harmless the
   Company, each of its directors, each of its officers who signed the
   Registration Statement and each person, if any, who controls the Company
   within the meaning of the Act, against any losses, claims, damages,
   liabilities or expenses to which the Company, or any such director, officer
   or controlling person may become subject, under the Act, the Exchange Act, or
   other federal or state statutory law or regulation, or at common law or
   otherwise (including in settlement of any litigation, if such settlement is
   effected with the written consent of such Underwriter), insofar as such
   losses, claims, damages, liabilities or expenses (or actions in respect
   thereof as contemplated below) arise out of or are based upon any untrue or
   alleged untrue statement of any material fact contained in the Registration
   Statement, any Preliminary Prospectus, the Prospectus, or any amendment or
   supplement thereto, or arise out of or are based upon the omission or alleged
   omission to state therein a material fact required to be stated therein or
   necessary to make the statements therein not misleading, in each case to the
   extent, but only to the extent, that such untrue statement or alleged untrue
   statement or omission or alleged omission was made in the Registration
   Statement, any Preliminary Prospectus, the Prospectus, or any amendment or
   supplement thereto, in reliance upon and in conformity with the information
   furnished to the Company pursuant to Section 3; and will reimburse the
   Company, or any such director, officer or controlling person for any legal
   and other expenses reasonably incurred by the Company, or any such director,
   officer or controlling person in connection with investigating,

                                       20

<PAGE>
 
   defending, settling, compromising or paying any such loss, claim, damage,
   liability, expense or action.  In addition to its other obligations under
   this Section 10(b), each Underwriter severally agrees that, as an interim
   measure during the pendency of any claim, action, investigation, inquiry or
   other proceeding arising out of or based upon any statement or omission, or
   any alleged statement or omission, described in this Section 10(b) which
   relates to information furnished to the Company pursuant to Section 3, it
   will reimburse the Company (and, to the extent applicable, each officer,
   director, controlling person) on a quarterly basis for all reasonable legal
   or other expenses incurred in connection with investigating or defending any
   such claim, action, investigation, inquiry or other proceeding,
   notwithstanding the absence of a judicial determination as to the propriety
   and enforceability of the Underwriters' obligation to reimburse the Company
   (and, to the extent applicable, each officer, director or controlling person)
   for such expenses and the possibility that such payments might later be held
   to have been improper by a court of competent jurisdiction.  To the extent
   that any such interim reimbursement payment is so held to have been improper,
   the Company (and, to the extent applicable, each officer, director or
   controlling person) shall promptly return it to the Underwriters together
   with interest, compounded daily, determined on the basis of the Prime Rate.
   Any such interim reimbursement payments which are not made to the Company
   within thirty days of a request for reimbursement shall bear interest at the
   Prime Rate from the date of such request.  This indemnity agreement will be
   in addition to any liability which such Underwriter may otherwise have.

      (c)  Promptly after receipt by an indemnified party under this Section 10
   of notice of the commencement of any action, such indemnified party will, if
   a claim in respect thereof is to be made against an indemnifying party under
   this Section 10, notify the indemnifying party in writing of the
   commencement thereof; but the omission so to notify the indemnifying party
   will not relieve it from any liability which it may have to any indemnified
   party for contribution or otherwise than under the indemnity agreement
   contained in this Section 10 or to the extent it is not prejudiced as a
   proximate result of such failure.  In case any such action is brought against
   any indemnified party and such indemnified party seeks or intends to seek
   indemnity from an indemnifying party, the indemnifying party will be entitled
   to participate in, and, to the extent that it may wish, jointly with all
   other indemnifying parties similarly notified, to assume the defense thereof
   with counsel reasonably satisfactory to such indemnified party; provided,
   however, if the defendants in any such action include both the indemnified
   party and the indemnifying party and the indemnified party shall have
   reasonably concluded that there may be a conflict between the positions of
   the indemnifying party and the indemnified party in conducting the defense of
   any such action or that there may be legal defenses available to it and/or
   other indemnified parties which are different from or additional to those
   available to the indemnifying party, the indemnified party or parties shall
   have the right to select separate counsel to assume such legal defenses and
   to otherwise participate in the defense of such action on behalf of such
   indemnified party or parties.  Upon receipt of notice from the indemnifying
   party to such indemnified party of its election so to assume the defense of
   such action and approval by the indemnified party of counsel, the
   indemnifying party will not be liable to such indemnified party under this
   Section 10 for any legal or other expenses subsequently incurred by such
   indemnified party in connection with the defense thereof unless (i) the
   indemnified party shall have employed such counsel in connection with the
   assumption of legal defenses in accordance with the proviso to the next
   preceding sentence (it being understood, however, that the indemnifying party
   shall not be liable for the expenses of more than one separate counsel,
   approved by the Representatives in the case of Section 10(b), representing
   the indemnified parties who are parties to such action) or (ii) the
   indemnifying party shall not have employed counsel reasonably satisfactory to
   the indemnified party to represent the indemnified party within a reasonable
   time after notice of commencement of the action, in each of which cases the
   fees and expenses of counsel shall be at the expense of the indemnifying
   party.

                                       21

<PAGE>
 
      (d)  If the indemnification provided for in this Section 10 is required by
   its terms but is for any reason held to be unavailable to or otherwise
   insufficient to hold harmless an indemnified party under Section 10(a), (b)
   or (c) in respect of any losses, claims, damages, liabilities or expenses
   referred to herein, then each applicable indemnifying party shall contribute
   to the amount paid or payable by such indemnified party as a result of any
   losses, claims, damages, liabilities or expenses referred to herein (i) in
   such proportion as is appropriate to reflect the relative benefits received
   by the Company and the Underwriters from the offering of the Common Shares or
   (ii) if the allocation provided by clause (i) above is not permitted by
   applicable law, in such proportion as is appropriate to reflect not only the
   relative benefits referred to in clause (i) above but also the relative fault
   of the Company and the Underwriters in connection with the statements or
   omissions or inaccuracies in the representations and warranties herein which
   resulted in such losses, claims, damages, liabilities or expenses, as well as
   any other relevant equitable considerations.  The respective relative
   benefits received by the Company and the Underwriters shall be deemed to be
   in the same proportion, in the case of the Company, as the total price paid
   to the Company for the Common Shares sold by it to the Underwriters (net of
   underwriting commissions but before deducting expenses) and, in the case of
   the Underwriters, as the underwriting commissions received by them bears to
   the total of such amounts paid to the Company and received by the
   Underwriters as underwriting commissions.  The relative fault of the Company
   and the Underwriters shall be determined by reference to, among other things,
   whether the untrue or alleged untrue statement of a material fact or the
   omission or alleged omission to state a material fact or the inaccurate or
   the alleged inaccurate representation and/or warranty relates to information
   supplied by the Company or the Underwriters and the parties' relative intent,
   knowledge, access to information and opportunity to correct or prevent such
   statement or omission.  The amount paid or payable by a party as a result of
   the losses, claims, damages, liabilities and expenses referred to above shall
   be deemed to include, subject to the limitations set forth in Section 10(c),
   any legal or other fees or expenses reasonably incurred by such party in
   connection with investigating or defending any action or claim.  The
   provisions set forth in Section 10(c) with respect to notice of commencement
   of any action shall apply if a claim for contribution is to be made under
   this Section 10(d); provided, however, that no additional notice shall be
   required with respect to any action for which notice has been given under
   Section 10(c) for purposes of indemnification.  The Company and the
   Underwriters agree that it would not be just and equitable if contribution
   pursuant to this Section 10 were determined solely by pro rata allocation
   (even if the Underwriters were treated as one entity for such purpose) or by
   any other method of allocation which does not take account of the equitable
   considerations referred to above.  Notwithstanding the provisions of this
   Section 10, no Underwriter shall be required to contribute any amount in
   excess of the amount of the total underwriting commissions received by such
   Underwriter in connection with the Common Shares underwritten by it and
   distributed to the public.  No person guilty of fraudulent misrepresentation
   (within the meaning of Section 11(f) of the Act) shall be entitled to
   contribution from any person who was not guilty of such fraudulent
   misrepresentation.  The Underwriters' obligations to contribute pursuant to
   this Section 10 are several in proportion to their respective underwriting
   commitments and not joint.

      (e)  It is agreed that any controversy arising out of the operation of the
   interim reimbursement arrangements set forth in Sections 10(a) and (b),
   including the amounts of any requested reimbursement payments and the method
   of determining such amounts, shall be settled by arbitration conducted under
   the provisions of the Constitution and Rules of the Board of Governors of the
   New York Stock Exchange, Inc. or pursuant to the Code of Arbitration
   Procedure of the NASD.  Any such arbitration must be commenced by service of
   a written demand for arbitration or written notice of intention to arbitrate,
   therein electing the arbitration tribunal.  In the event the party demanding
   arbitration does not make such designation of an arbitration tribunal in such
   demand or notice, then

                                       22

<PAGE>
 
   the party responding to said demand or notice is authorized to do so.  Such
   an arbitration would be limited to the operation of the interim reimbursement
   provisions contained in Sections 10(a) and (b) and would not resolve the
   ultimate propriety or enforceability of the obligation to reimburse expenses
   which is created by the provisions of such Sections 10(a) and (b).

   SECTION 11.  DEFAULT OF UNDERWRITERS.  It shall be a condition to this
Agreement and the obligation of the Company to sell and deliver the Common
Shares hereunder, and of each Underwriter to purchase the Common Shares in the
manner as described herein, that, except as hereinafter in this paragraph
provided, each of the Underwriters shall purchase and pay for all the Common
Shares agreed to be purchased by such Underwriter hereunder upon tender to the
Representatives of all such shares in accordance with the terms hereof.  If any
Underwriter or Underwriters default in their obligations to purchase Common
Shares hereunder on either the First or Second Closing Date and the aggregate
number of Common Shares which such defaulting Underwriter or Underwriters agreed
but failed to purchase on such Closing Date does not exceed 10% of the total
number of Common Shares which the Underwriters are obligated to purchase on such
Closing Date, the non-defaulting Underwriters shall be obligated severally, in
proportion to their respective commitments hereunder, to purchase the Common
Shares which such defaulting Underwriters agreed but failed to purchase on such
Closing Date.  If any Underwriter or Underwriters so default and the aggregate
number of Common Shares with respect to which such default occurs is more than
the above percentage and arrangements satisfactory to the Representatives and
the Company for the purchase of such Common Shares by other persons are not made
within 48 hours after such default, this Agreement will terminate without
liability on the part of any non-defaulting Underwriter or the Company except
for the expenses to be paid by the Company pursuant to Section 6 and except to
the extent provided in Section 10.

   In the event that Common Shares to which a default relates are to be
purchased by the non-defaulting Underwriters or by another party or parties, the
Representatives or the Company shall have the right to postpone the First or
Second Closing Date, as the case may be, for not more than five business days in
order that the necessary changes in the Registration Statement, Prospectus and
any other documents, as well as any other arrangements, may be effected.  As
used in this Agreement, the term "Underwriter" includes any party substituted
for an Underwriter under this Section 11.  Nothing herein will relieve a
defaulting Underwriter from liability for its default.

   SECTION 12.  EFFECTIVE DATE.  This Agreement shall become effective
immediately as to Sections 6, 8, 10, 13 and 14 and, as to all other
provisions, (i) if at the time of execution of this Agreement the Registration
Statement has not become effective, at 2 P.M., California time, on the first
full business day following the effectiveness of the Registration Statement, or
(ii) if at the time of execution of this Agreement the Registration Statement
has been declared effective, at 2 P.M., California time, on the first full
business day following the date of execution of this Agreement; but this
Agreement shall nevertheless become effective at such earlier time after the
Registration Statement becomes effective as the Representatives may determine on
and by notice to the Company or by release of any of the Common Shares for sale
to the public.  For purposes of this Section 12, the Common Shares shall be
deemed to have been so released upon the release for publication of any
newspaper advertisement relating to the Common Shares or upon the release by the
Representatives of telegrams (i) advising Underwriters that the Common Shares
are released for public offering or (ii) offering the Common Shares for sale to
securities dealers, whichever may occur first.

   SECTION 13.  TERMINATION.  Without limiting the right to terminate this
Agreement pursuant to any other provision hereof:

                                       23

<PAGE>
 
      (a)  This Agreement may be terminated by the Company by notice to the
   Representatives or by the Representatives by notice to the Company at any
   time prior to the time this Agreement shall become effective as to all its
   provisions, and any such termination shall be without liability on the part
   of the Company to any Underwriter (except for the expenses to be paid or
   reimbursed by the Company pursuant to Sections 6 and 8 and except to the
   extent provided in Section 10) or of any Underwriter to the Company (except
   to the extent provided in Section 10).

      (b)  This Agreement may also be terminated by the Representatives prior to
   the First Closing Date by notice to the Company (i) if additional material
   governmental restrictions, not in force and effect on the date hereof, shall
   have been imposed upon trading in securities generally or minimum or maximum
   prices shall have been generally established on the New York Stock Exchange
   or the American Stock Exchange or in the over-the-counter market by the NASD,
   or trading in securities generally shall have been suspended on either such
   Exchange or in the over-the-counter market by the NASD, or a general banking
   moratorium shall have been established by federal, New York, Massachusetts or
   California authorities, (ii) if an outbreak of major hostilities or other
   national or international calamity or any substantial change in political,
   financial or economic conditions shall have occurred or shall have
   accelerated or escalated to such an extent, as, in the judgment of the
   Representatives, to affect adversely the marketability of the Common Shares,
   (iii) if any adverse event shall have occurred or shall exist which makes
   untrue or incorrect in any material respect any statement or information
   contained in the Registration Statement or Prospectus or which is not
   reflected in the Registration Statement or Prospectus but should be reflected
   therein in order to make the statements or information contained therein not
   misleading in any material respect, or (iv) if there shall be any action,
   suit or proceeding pending or threatened, or there shall have been any
   development or prospective development involving particularly the business or
   properties or securities of the Company or any of its subsidiaries or the
   transactions contemplated by this Agreement, which, in the reasonable
   judgment of the Representatives, may materially and adversely affect the
   Company's business or earnings and makes it impracticable or inadvisable to
   offer or sell the Common Shares.  Any termination pursuant to this Section
   13(b) shall be without liability on the part of any Underwriter to the
   Company or on the part of the Company to any Underwriter, except for expenses
   to be paid or reimbursed by the Company pursuant to Sections 6 and 8 and
   except to the extent provided in Section 10.

      (c)  This Agreement shall also terminate at 5 P.M., California time, on
   the tenth full business day after the Registration Statement shall have
   become effective if the initial public offering price of the Common Shares
   shall not then as yet have been determined as provided in Section 4. Any
   termination pursuant to this Section 13(c) shall be without liability on the
   part of any Underwriter to the Company or on the part of the Company to any
   Underwriter, except for expenses to be paid or reimbursed by the Company
   pursuant to Sections 6 and 8 and except to the extent provided in Section 10.

   SECTION 14.  REPRESENTATIONS AND INDEMNITIES TO SURVIVE DELIVERY.  The
respective indemnities, agreements, representations, warranties and other
statements of the Company, of its officers and of the several Underwriters set
forth in or made pursuant to this Agreement will remain in full force and
effect, regardless of any investigation made by or on behalf of any Underwriter
or the Company or any of its or their partners, officers or directors or any
controlling person, as the case may be, and will survive delivery of and payment
for the Common Shares sold hereunder and any termination of this Agreement.

   SECTION 15.  NOTICES.  All communications hereunder shall be in writing and,
if sent to the Representatives shall be mailed, delivered or telegraphed and
confirmed to the Representatives in care of Montgomery Securities at 600
Montgomery Street, San Francisco, California 94111, Attention:  Jack

                                       24

<PAGE>
 
G. Levin, with a copy to Foley, Hoag & Eliot, One Post Office Square, Boston,
Massachusetts 02109, Attention:  Adam Sonnenschein, and if sent to the Company
shall be mailed, delivered or telegraphed and confirmed to the Company at 20
Sylvan Road, Woburn, Massachusetts, Attention:  Chief Financial Officer, with a
copy to Brown, Rudnick, Freed & Gesmer, One Financial Center, Boston,
Massachusetts 02111, Attention:  Steven R. London.  The Company or the
Representatives may change the address for receipt of communications hereunder
by giving notice to the others.

   SECTION 16.  SUCCESSORS.  This Agreement will inure to the benefit of and be
binding upon the parties hereto, including any substitute Underwriters pursuant
to Section 11, and to the benefit of the officers and directors and controlling
persons referred to in Section 10, and in each case their respective
successors, personal representatives and assigns, and no other person will have
any right or obligation hereunder.  No such assignment shall relieve any party
of its obligations hereunder.  The term "successors" shall not include any
purchaser of the Common Shares as such from any of the Underwriters merely by
reason of such purchase.

   SECTION 17.  REPRESENTATION OF UNDERWRITERS.  You will act as the
Representatives for the several Underwriters in connection with all dealings
hereunder, and any action under or in respect of this Agreement taken by the
Representatives jointly or by Montgomery Securities, on behalf of the
Representatives, will be binding upon all the Underwriters.

   SECTION 18.  PARTIAL UNENFORCEABILITY.  The invalidity or unenforceability of
any section, paragraph or provision of this Agreement shall not affect the
validity or enforceability of any other section, paragraph or provision hereof.
If any section, paragraph or provision of this Agreement is for any reason
determined to be invalid or unenforceable, there shall be deemed to be made such
minor changes (and only such minor changes) as are necessary to make it valid
and enforceable.

   SECTION 19.  APPLICABLE LAW.  This Agreement shall be governed by and
construed in accordance with the internal laws (and not the laws pertaining to
conflicts of laws) of the State of California.

   SECTION 20.  GENERAL.  This Agreement constitutes the entire agreement of the
parties to this Agreement and supersedes all prior written or oral and all
contemporaneous oral agreements, understandings and negotiations with respect to
the subject matter hereof.  This Agreement may be executed in counterparts, each
of which shall be an original and both of which shall constitute one and the
same document.  In this Agreement, the singular and the plural include one
another.  The section headings in this Agreement are for the convenience of the
parties only and will not affect the construction or interpretation of this
Agreement.  Unless otherwise provided, references to "Sections" shall be to
sections of this Agreement.  The words "herein" and "hereof" and other words of
similar import refer to this Agreement as a whole and not to any particular part
of this Agreement.  The word "including" as used herein shall not be construed
so as to exclude any other thing not referred to or described.  This Agreement
may be amended or modified, and the observance of any term of this Agreement may
be waived, only by a writing signed by the Company and the Representatives.

                            *          *          *

   If the foregoing is in accordance with your understanding of our agreement,
kindly sign and return to us the enclosed copies hereof, whereupon it will
become a binding agreement between the Company and the several Underwriters,
including the Representatives, all in accordance with its terms.

                                 Very truly yours,

                                       25

<PAGE>
 
                                 Alpha Industries, Inc.



                                 By:___________________________________________
                                    President and Chief Executive Officer

The foregoing Underwriting Agreement is hereby 
confirmed and accepted in San Francisco, California, 
as of the date first above written.

Montgomery Securities
Oppenheimer & Co., Inc.
Adams, Harkness & Hill, Inc.
 As Representatives of the several
 Underwriters named in Schedule A hereto

By:  Montgomery Securities



   By:__________________________________

                                       26

<PAGE>
 
                                   SCHEDULE A


<TABLE> 
<CAPTION> 
                                                             Number of Firm
                                                             Common Shares
Name of Underwriter                                          to be Purchased
- -------------------                                          ---------------
<S>                                                          <C> 
Montgomery Securities ..................................
Oppenheimer & Co., Inc. ................................
Adams, Harkness & Hill, Inc. ...........................















                                                                ---------
                  TOTAL ................................        2,000,000
                                                                =========
</TABLE>
 

                                       27

<PAGE>
 
                                  Schedule B

                         PRICE DETERMINATION AGREEMENT

          This Agreement is being delivered pursuant to Section 4 of the
Underwriting Agreement dated _________________, 1995 between Alpha Industries,
Inc. and the several Underwriters named in Schedule A thereto.  Capitalized
terms used but not defined herein shall have the respective meanings ascribed to
them in such Underwriting Agreement.

          The Company and the Underwriters hereby confirm their agreement that
the initial public offering price of the Common Shares shall be $____ per share,
that the underwriting discount shall be $____ per share, and that the purchase
price to be paid by the several Underwriters for the Common Shares to be
purchased from the Company shall be $____ per share.

          This Agreement may be executed in counterparts, each of which shall be
an original and both of which shall constitute one and the same document.
Dated:  ________________, 1995

                                 Alpha Industries, Inc.



                                 By:____________________________________________
                                    Title:


                                 Montgomery Securities
                                 Oppenheimer & Co., Inc.
                                 Adams, Harkness & Hill, Inc.
                                  As Representatives of the several Underwriters

                                 By:  Montgomery Securities



                                    By:_________________________________________

                                       28



<PAGE>
 
                     RESTATED CERTIFICATE OF INCORPORATION
                     -------------------------------------

                                      OF
                                      --

                            ALPHA INDUSTRIES, INC.
                            ----------------------


     It is hereby certified that:

     1.  The present name of the Corporation (hereinafter called the
"corporation") is Alpha Industries, Inc.  The name under which the corporation
was originally incorporated is Alpha Microwave, Inc. and the date of filing the
original certificate of incorporation of the corporation with the Secretary of
State of Delaware is September 10, 1962.

     2.  The provisions of the Certificate of Incorporation, as amended, of the
corporation are hereby restated and integrated into the single instrument which
is hereinafter set forth, and which is entitled Restated Certificate of
Incorporation of Alpha Industries, Inc. without any further amendments and
without any discrepancy between the provisions of the Certificate of
Incorporation as amended and the provisions of the said single instrument
hereinafter set forth.

     3.  The restatement of the Certificate of Incorporation herein certified
has been duly adopted by the directors in accordance with the provisions of
Sections 141 and 245 of the General Corporation Law of the State of Delaware.

     4.  The effective date of the Restated Certificate of Incorporation shall
be
 its filing date.

     5.  The Certificate of Incorporation of the corporation, as restated
herein, shall upon the effective date of this Restated Certificate of
Incorporation, read as follows:

                                      -1-

<PAGE>
 
                     RESTATED CERTIFICATE OF INCORPORATION
                     -------------------------------------

                                      OF
                                      --

                            ALPHA INDUSTRIES, INC.
                            ----------------------

     FIRST:  The name of the corporation is ALPHA INDUSTRIES, INC.
     -----                                                        

     SECOND: Its principal office in the State of Delaware is located at 32
     ------                                                                   
Loockerman Square, Suite L-100, in the City of Dover, County of Kent. The name
and address of its registered agent is The Prentice-Hall Corporation System,
Inc., 32 Loockerman Square, Suite L-100, Dover, Delaware.

     THIRD:  The nature of the business, or objects or purposes to be 
     -----                                                           
transacted, promoted or carried on are:

     To manufacture, produce, assemble, fabricate, import, lease, purchase or
otherwise acquire; to invest in, own, hold, use, license the use of, install,
handle, maintain, service or repair; to sell, pledge, mortgage, exchange,
export, distribute, lease, assign and otherwise dispose of, and generally to
trade and deal in and with, as principal or agent, at wholesale, retail, on
commission or otherwise, electronic systems, equipment and components, and
electrical and electro-mechanical apparatus and equipment of all kinds and
descriptions, electronics, telecommunications, communications and similar
equipment of all descriptions, microwave telephone devices and equipment, radio,
sonar, radar, television and related and similar devices and equipment, cables,
motors, dynamos, generating plants, meters, supplies, parts, equipment,
apparatus, machinery improvements, appliances, tools, and goods, wares,
merchandise, commodities, articles of commerce and property of every kind and
description, and any and all products, machinery, equipment and supplies used or
useful in connection therewith.

     To work and operate as technicians, repairmen, welders, toolmakers, die
casters, moulders, founders, metal workers, machinists, smiths, modelmakers and
metallurgists; to design, construct, repair, improve and manufacture all kinds
of tools, machines, parts of machines, devices, mechanisms and inventions of all
kinds; to carry on the business of manufacturing, buying, selling and generally
dealing in and with machineshop, foundry and factory supplies, tools, apparatus,
equipment, and machinery of all kinds.

     To carry on the business of research, experimentation, invention,
discovery, design, testing, development, and utilization or processes and
methods, or improvements thereto, in all the arts and sciences, and trades, and
in the engineering fields; including the conception, development, execution and
completion of special scientific and engineering projects, on its own behalf and
on behalf of any other person, firm, association, corporation, public or
private, or the government of the United States of America, or any foreign
government, or any political subdivision thereof, or any governmental agency,
and in this connection to operate testing stations as may be necessary or
advisable.

                                      -2-

<PAGE>
 
     To carry on and make tests, experiments, analyses and to do research work
and to perform analytical, experimental and research services of all kinds
whether of a scientific nature or otherwise, and to do any and all acts and
transact any and all business which shall or may be or become incidental to or
arise out of or be connected with such business, or any part thereof.

     To acquire by purchase, assignment, grant, license or otherwise, to apply
for, secure, lease or in any manner obtain, to develop, hold, use, own, exploit,
operate, enjoy and introduce, to sell, assign, lease, mortgage, pledge, grant
licenses and rights of all kinds in respect of, or otherwise dispose of, and
generally to deal in and with and turn to account for any or all purposes,
either for itself or as nominee or agent for others:

     (1) Any and all inventions, devices, processes and discoveries, and
improvements and modifications thereof and rights and interests therein;

     (2) Any and all letters patent or applications for letters patent of the
United States of America or of any other country, state, locality or authority,
and any and all rights, interests and privileges connected therewith or
incidental or appertaining thereto;

     (3) Any and all copyrights granted by the United States of America or any
other country, state, locality or authority, and any and all rights, interests
and privileges connected therewith or incidental or appertaining thereto; and

     (4) Any and all trade-marks, trade names, trade symbols, labels, designs
and other indications of origin and ownership granted by or recognized under the
laws of the United States of America or any other country, state, locality or
authority, and any and all rights, interests and privileges connected therewith
or incidental or appertaining thereto.

     To engage in engineering work of all kinds, including but not limited to
consulting engineering; to design, lay out, construct, supervise the
construction of, install, maintain, own, operate, lease, repair, service, and
generally deal in and deal with electronic, electrical and mechanical apparatus,
devices, systems, processes, machinery, supplies and any other articles or
materials used or capable of being used in connection with any of the foregoing
and in furtherance of any of the foregoing objects or purposes, to employ the
services of consulting, civil, chemical, mechanical, electronic, electrical and
industrial engineers in all or any of their respective branches.

     To act as agent, manufacturer's agent, distributor, representative, dealer,
broker, wholesaler, retailer, or in any other capacity as principal or agent,
and with any and all persons, firms, partnerships, corporations, and others, and
to purchase, sell, distribute, export, import, pledge, make advances upon, or
otherwise deal in and deal with goods, wares and merchandise of every class and
description; to act as dealers, distributors, selling agents or representatives,
sectionally or nationally, of manufacturers, producers, distributors, dealers
and others; to establish and maintain dealerships and agencies of all kinds; to
represent in any capacity, manufacturers, wholesalers, jobbers and dealers in
the sale and distribution of their products.

                                      -3-

<PAGE>
 
     To acquire by purchase, exchange, contract, lease, options for lease,
assignment of lease or otherwise, and to own, equip, erect, build, construct,
finance, maintain, operate and improve, and to sell, lease, mortgage, pledge,
transfer or otherwise dispose of, properties of all kinds, factories,
warehouses, stores, buildings, structures, offices, houses, works, plants,
depots, and other buildings and structures and all other property and things of
whatsoever kind and nature, real, personal or mixed, tangible or intangible,
including good will, in any part of the world, and to establish, acquire,
operate, conduct and carry on any business or businesses suitable, necessary,
useful or convenient in connection therewith.

     To manufacture, purchase or otherwise acquire, invest in, own, mortgage,
pledge, sell, assign and transfer or otherwise dispose of, trade, deal in and
deal with goods, wares and merchandise and personal property of every class and
description.

     To acquire, and pay for in cash, stock or bonds of this corporation or
otherwise, the good will, rights, assets and property, and to undertake or
assume the whole or any part of the obligations or liabilities of any person,
firm, association or corporation.

     To acquire by purchase, subscription or otherwise, and to receive, hold,
own, guarantee, sell, assign, exchange, transfer, mortgage, pledge or otherwise
dispose of or deal in and with any of the shares of the capital stock, or any
voting trust certificates in respect of the shares of capital stock, scrip,
warrants, rights, bonds, debentures, notes, trust receipts, and other
securities, obligations, choses in action and evidences of indebtedness or
interest issued or created by any corporations, joint stock companies,
syndicates, associations, firms, trusts or persons, public or private, or by the
government of the United States of America, or by any foreign government, or by
any state, territory, province, municipality or other political subdivision or
by any governmental agency, and as owner thereof to possess and exercise all the
rights, powers and privileges of ownership, including the right to execute
consents and vote thereon, and to do any and all acts and things necessary or
advisable for the preservation, protection, improvement and enhancement in value
thereof.

     To enter into, make and perform contracts of every kind and description
with any person, firm, association, corporation, municipality, county, state,
body politic or government or colony or dependency thereof.

     To borrow or raise moneys for any of the purposes of the corporation and,
from time to time without limit as to amount, to draw, make, accept, endorse,
execute and issue promissory notes, drafts, bills of exchange, warrants, bonds,
debentures and other negotiable or non-negotiable instruments and evidences of
indebtedness, and to secure the payment of any thereof and of the interest
thereon by mortgage upon or pledge, conveyance or assignment in trust of the
whole or any part of the property of the corporation, whether at the time owned
or thereafter acquired, and to sell, pledge or otherwise dispose of such bonds
or other obligations of the corporation for its corporate purposes.

     To loan to any person, firm or corporation any of its surplus funds, either
with or without security.

                                      -4-

<PAGE>
 
     To purchase, hold, sell and transfer the shares of its own capital stock;
provided it shall not use its funds or property for the purchase of its own
shares of capital stock when such use would cause any impairment of its capital
except as otherwise permitted by law, and provided further that shares of its
own capital stock belonging to it shall not be voted upon directly or
indirectly.

     To have one or more offices, to carry on all or any of its operations and
business and without restriction or limit as to amount to purchase or otherwise
acquire, hold, own, mortgage, sell, convey or otherwise dispose of, real and
personal property of every class and description in any of the states,
districts, territories or colonies of the United States and in any and all
foreign countries, subject to the laws of such state, district, territory,
colony or country.

     In general, to carry on any other business in connection with the
foregoing, and to have and exercise all the powers conferred by the laws of
Delaware upon corporations formed under the General Corporation Law of the State
of Delaware, and to do any or all of the things hereinbefore set forth to the
same extent as natural persons might or could do.

     The objects and purposes specified in the foregoing clauses shall, except
where otherwise expressed, be in nowise limited or restricted by reference to,
or inference from, the terms of any other clause in this certificate of
incorporation, but the objects and purposes specified in each of the foregoing
clauses of this article shall be regarded as independent objects and purposes.

     FOURTH:  The total number of shares of stock which the Corporation shall
     ------                                                                
have the authority to issue is thirty million (30,000,000) and the par value of
each such share is twenty-five cents ($.25) amounting in the aggregate to Seven
Million Five Hundred Thousand Dollars ($7,500,000.00).

     The designations and the powers, preferences and rights, and the
qualifications, limitations or restrictions thereof are as follows:

     No stockholder of this corporation shall by reason of his holding shares of
any class have any preemptive or preferential right to purchase or subscribe to
any shares of any class of this corporation, now or hereafter to be authorized,
or any notes, debentures, bonds, or other securities convertible into or
carrying options or warrants to purchase shares of any class, now or hereafter
to be authorized, whether or not the issuance of any such shares, or such notes,
debentures, bonds or other securities, would adversely affect the dividend or
voting rights of such stockholder, other than such rights, if any, as the board
of directors, in its discretion from time to time may grant, and at such price
as the board of directors in its discretion may fix; and the board of directors
may issue shares of any class of this corporation, or any notes, debentures,
bonds, or other securities convertible into or carrying options or warrants to
purchase shares of any class, without offering any such shares of any class,
either in whole or in part, to the existing stockholders of any class.

     FIFTH:   The minimum amount of capital with which the corporation will
     -----                                                                
commence business is One Thousand Dollars ($1,000).

                                      -5-

<PAGE>
 
     SIXTH:   The names and places of residence of the incorporators are as
     -----                                                                
follows:


<TABLE> 
<CAPTION> 
          NAMES                             RESIDENCES
          -----                             ----------

          <S>                               <C> 
          S. H. Livesay                     Wilmington, Delaware

          J. F. Cook                        Wilmington, Delaware

          F. J. Obara, Jr.                  Wilmington, Delaware
</TABLE>
 

     SEVENTH: The corporation is to have perpetual existence.
     -------                                                                 

     EIGHTH:  The private property of the stockholders shall not be subject to
     ------                                                                   
the payment of corporate debts to any extent whatever.

     NINTH:  In furtherance and not in limitation of the powers conferred by
     -----                                                                  
statute, the board of directors is expressly authorized:

     To make, alter or repeal the by-laws of the corporation.

     To authorize and cause to be executed mortgages and liens upon the real and
personal property of the corporation.

     To set apart out of any of the funds of the corporation available for
dividends a reserve or reserves for any proper purpose and to abolish any such
reserve in the manner in which it was created.

     By resolution passed by a majority of the whole board, to designate one or
more committees, each committee to consist of two or more of the directors of
the corporation, which, to the extent provided in the resolution or in the by-
laws of the corporation, shall have and may exercise the powers of the board of
directors in the management of the business and affairs of the corporation, and
may authorize the seal of the corporation to be affixed to all papers which may
require it.  Such committee or committees shall have such name or names as may
be stated in the by-laws of the corporation or as may be determined from time to
time by resolution adopted by the board of directors.

     TENTH:  a) The By-laws of the corporation may provide for
     -----                                                    
                indemnification of directors, officers, employees and agents, by
                whomever elected or appointed, to the full extent permitted by
                law.

             b) A director shall be liable to the extent provided by applicable
                law (i) for breach of the director's duty of loyalty to the
                corporation or its stockholders, (ii) for acts or omissions not
                in good faith or which involve intentional misconduct or a
                knowing violation of law, (iii) pursuant to Section 174 of the
                Delaware General Corporation Law, or (iv) for any

                                      -6-

<PAGE>
 
                transaction from which the director derived an improper personal
                benefit. Except as set forth in the foregoing sentence, no
                director shall be personally liable to the corporation or its
                stockholders for monetary damages for any breach of fiduciary
                duty by such director as a director. No amendment to or repeal
                of this Paragraph (b) of Article Tenth shall apply to or have
                any effect on the liability or alleged liability of any director
                of the corporation for or with respect to any acts or omissions
                of such director occurring prior to such amendment.

     ELEVENTH:  No contract or other transaction between this corporation and
     --------                                                                
any person, firm, association or corporation and no act of this corporation
shall, in the absence of fraud, be invalidated or in any way affected by the
fact that any of the directors of this corporation  are pecuniarily or otherwise
interested, directly or indirectly, in such contract, transaction or act, or are
related to or interested in, as a director, stockholder, officer, employee,
member or otherwise, such person, firm, association or corporation.  Any
director so interested or related who is present at any meeting of the board of
directors or committee or directors at which action on any such contract,
transaction or act is taken may be counted in determining the presence of a
quorum at such meeting and may vote thereat with respect to such contract,
transaction or act with like force and effect as if he was not so interested or
related.  No director so interested or related shall, because of such interest
or relationship, be disqualified from holding his office or be liable to the
corporation or any stockholder or creditor thereof for any loss incurred by this
corporation under or by reason of such contract, transaction or act, or be
accountable for any gains or profits he may have realized therein.

     TWELFTH:  Whenever a compromise or arrangement is proposed between this
     -------                                                                
corporation and its creditors or any class of them and/or between this
corporation and its stockholders or any class of them, any court of equitable
jurisdiction within the State of Delaware may, on the application in a summary
way of this corporation or of any creditor or stockholder thereof, or on the
application of any receiver or receivers appointed for this corporation under
the provisions of section 29l of Title 8 of the Delaware Code or on the
application of trustees in dissolution or of any receiver or receivers appointed
for this corporation under the provisions of section 279 of Title 8 of the
Delaware Code order a meeting of the creditors or class of creditors, and/or of
the stockholders or class of stockholders of this corporation, as the case may
be, to be summoned in such manner as the said court directs.  If a majority in
number representing three-fourths in value of the creditors or class of
creditors, and/or of the stockholders or class of stockholders of this
corporation, as the case may be, agree to any compromise or arrangement and to
any reorganization of this corporation as consequence of such compromise or
arrangement, the said compromise or arrangement and the said reorganization
shall, if sanctioned by the court to which the said application has been made,
be binding on all the creditors or class of creditors, and/or on all the
stockholders or class of stockholders, of this corporation, as the case may be,
and also on this corporation.

     THIRTEENTH:  Meetings of stockholders may be held outside the State of
     ----------                                                            
Delaware, if the by-laws so provide.  The books of the corporation may be kept
(subject to any provisions contained in the statutes) outside the State of
Delaware at such place or places as may be 

                                      -7-

<PAGE>
 
designated from time to time by the board of directors or in the by-laws of the
corporation. Elections of directors need not be by ballot unless the by-laws of
the corporation shall so provide.

     FOURTEENTH:  Any action required or permitted to be taken by the
     ----------                                                      
stockholders of the corporation must be effected at an annual or special meeting
of stockholders of the corporation and may not be effected by any consent in
writing by such stockholders.

     FIFTEENTH:
     --------- 

   I.  (i)    Except as set forth in part (ii) of this Article Fifteenth, the
              affirmative vote or consent of the holders of 80% of the shares of
              all classes of stock of the corporation entitled to vote for the
              election of directors, considered for the purposes of this ARTICLE
              as one class, shall be required (a) for the adoption of any
              agreement for the merger or consolidation of the corporation with
              or into any Other Corporation (as hereinafter defined), or (b) to
              authorize any sale, lease, exchange, mortgage, pledge or other
              disposition of all, or substantially all of the assets of the
              corporation or any Subsidiary (as hereinafter defined) to any
              Other Corporation, or (c) to authorize the issuance or transfer by
              the corporation of any Substantial Amount (as hereinafter defined)
              of securities of the corporation in exchange for the securities or
              assets of any Other Corporation. Such affirmative vote or consent
              shall be in addition to the vote or consent of the holders of the
              stock of the corporation otherwise required by law, the
              Certificate of Incorporation of the corporation or any agreement
              or contract to which the corporation is a party.
             
       (ii)   The provisions of part (i) of this Article Fifteenth, shall not be
              applicable to any transaction described therein if such
              transaction is approved by resolution of the Board of Directors of
              the corporation provided that a majority of the members of the
              Board of Directors voting for the approval of such transaction
              were duly elected and acting members of the Board of Directors
              prior to the time any such Other Corporation may have become a
              Beneficial Owner (as hereinafter defined) of 5% or more of the
              shares of stock of the corporation entitled to vote for the
              election of directors.
             
       (iii)  For the purposes of part (ii) of this Article, the Board of
              Directors shall have the power and duty to determine for the
              purposes of this Article Fifteenth, on the basis of information
              known to such Board, if and when any Other Corporation is the
              Beneficial Owner of 5% or more of the outstanding shares of stock
              of the corporation entitled to vote for the election of directors.
              Any such determination shall be conclusive and binding for all
              purposes of this Article Fifteenth.
             
       (iv)   As used in Article Fifteenth, the following terms shall have the
              meanings indicated:

                                      -8-

<PAGE>
 
              "Other Corporation" means any person, firm, corporation or other
              entity, other than a subsidiary of the corporation.

              "Subsidiary" means any corporation in which the corporation owns,
              directly or indirectly, more than 50% of the voting securities.

              "Substantial Amount" means any securities of the corporation
              having a then fair market value of more than $500,000.

              An Other Corporation (as defined above) shall be deemed to be the
              "Beneficial Owner" of stock if such Other Corporation or any
              "affiliate" or "associate" of such Other Corporation (as those
              terms are defined in Rule 12b-2 promulgated under the Securities
              Exchange Act of 1934 (15 U.S.C. 78 aaa et seq.), as amended from
              time to time), directly or indirectly, controls the voting of such
              stock or has any options, warrants, conversion or other rights to
              acquire such stock.

     (v)      This Article Fifteenth may not be amended, revised or revoked, in
              whole or in part, except by the affirmative vote or consent of the
              holders of 80% of the shares of all classes of stock of the
              corporation entitled to vote for the election of directors,
              considered for the purposes of this Article Fifteenth as one class
              of stock.

     SIXTEENTH:  The number of directors shall be fixed from time to time
     ---------                                                           
exclusively by the board of directors pursuant to a resolution adopted by a
majority of the total number of authorized directors (whether or not there exist
any vacancies in previously authorized directorships at the time any such
resolution is presented to the board of directors for adoption).  At the 1983
annual meeting of stockholders, the directors shall be divided into three
classes, as nearly equal in number as possible, with the term of office of the
first class to expire at the 1984 annual meeting of stockholders, the term of
office of the second class to expire at the 1985 annual meeting of stockholders
and the term of office of the third class to expire at the 1986 annual meeting
of stockholders.  At each annual meeting of stockholders following such initial
classification and election, directors elected to succeed those directors whose
terms expire shall be elected for a term of office to expire at the third
succeeding annual meeting of stockholders after their election, unless, by
reason of any intervening changes in the authorized number of directors, the
board shall designate one or more of the then expiring directorships as
directorships of another class in order more nearly to achieve equality of
number of directors among the classes.

     Notwithstanding the rule that the three classes shall be as nearly equal in
number of directors as possible, in the event of any change in the authorized
number of directors, each director then continuing to serve as such shall
nevertheless continue as a director of the class of which he is a member until
the expiration of his current term, or his prior death, resignation or removal.
If any newly created directorship may, consistently with the rule that the three
classes shall be as nearly equal in number of directors as possible, be
allocated to one of two or more 

                                      -9-

<PAGE>
 
classes, the board of directors shall allocate it to that of the available
classes whose term of office is due to expire at the earliest date following
such allocation.

     Vacancies resulting from any increase in the authorized number of directors
or any vacancies in the board of directors resulting from death, resignation,
retirement, disqualification, removal from office or other cause may be filled
only by a majority vote of the directors then in office, though less than a
quorum, and directors so chosen shall hold office for a term expiring at the
annual meeting of stockholders at which the term of office of the class to which
they have been elected expires.  No decrease in the number of authorized
directors shall shorten the term of any incumbent director.

     SEVENTEENTH:
     ----------- 

     A.      The following definitions shall apply for the purpose of this
Article Seventeenth only:

    (1)      "Announcement Date" shall mean the date of first public
             announcement of the proposal of a Business Combination.

    (2)      "Business Combination" shall mean:

             (i)   any merger or consolidation of the corporation or any
                   Subsidiary with (a) any Related Person, or (b) any other
                   corporation (whether or not itself a Related Person) which
                   is, or after such merger or consolidation would be, an
                   Affiliate of a Related Person; or

             (ii)  any sale, lease, exchange, mortgage, pledge, transfer or
                   other disposition (in one transaction or a series of
                   transactions) to or with any Related Person or any Affiliate
                   of any Related Person of any assets of the corporation or any
                   Subsidiary having an aggregate Fair Market Value of $500,000
                   or more; or

             (iii) the issuance or transfer by the corporation or any Subsidiary
                   (in one transaction or a series of transactions) of any
                   securities of the corporation or any Subsidiary to any
                   Related Person or any Affiliate of any Related Person in
                   exchange for cash, securities or other property (or a
                   combination thereof) having an aggregate Fair Market Value of
                   $500,000 or more; or

             (iv)  the adoption of any plan or proposal for the liquidation or
                   dissolution of the corporation proposed by or on behalf of
                   any Related Person or any Affiliate of any Related Person; or

             (v)   any reclassification of securities (including any reverse
                   stock split), or recapitalization of the corporation, or any
                   merger or consolidation of the corporation with any of its
                   Subsidiaries or any other transaction (whether

                                      -10-

<PAGE>
 
                   or not with or into or otherwise involving the Related
                   Person) which has the effect, directly or indirectly, of
                   increasing the proportionate share of the outstanding shares
                   of any class of equity or convertible securities of the
                   corporation or any Subsidiary which is directly or indirectly
                   owned by any Related Person or any Affiliate of any Related
                   Person.

    (3)      "Consideration Received" shall mean the amount of cash and the Fair
             Market Value, as of the Consummation Date, of consideration other
             than cash received by the stockholder. In the event of any Business
             Combination in which the corporation survives, the consideration
             other than cash shall include shares of any class of outstanding
             Voting Stock retained by the holders of such shares.

    (4)      "Consummation Date" shall mean the date upon which the Business
             Combination is consummated.

    (5)      "Continuing Director" shall mean any member of the board of
             directors of the corporation who is unaffiliated with the Related
             Person and who was a member of the board of directors prior to the
             time that the Related Person became a Related Person, and any
             successor of a Continuing Director who is unaffiliated with the
             Related Person and is recommended to succeed a Continuing Director
             by a majority of the Continuing Directors then on the board of
             directors.

    (6)      "Determination Date" shall mean the date upon which a Related
             Person became a Related Person.

    (7)      "Exchange Act" shall mean the Securities Exchange Act of 1934 as in
             effect on May 1, 1983.

    (8)      "Fair Market Value" shall mean: (i) in the case of stock, the
             highest closing sale price during the 30-day period immediately
             preceding the date in question of a share of such stock on the
             principal United States securities exchange registered under the
             Exchange Act on which such stock is listed, or, if such stock is
             not listed on any such exchange, the highest closing bid quotation
             with respect to a share of such stock during the 30-day period
             preceding the date in question on the National Association of
             Securities Dealers, Inc. Automated Quotations System or any system
             then in use or, if no such quotations are available, the fair
             market value on the date in question of a share of such stock as
             determined by the board of directors in good faith; and (ii) in the
             case of property other than cash or stock, the fair market value of
             such property on the date in question as determined by the board of
             directors in good faith.

    (9)      "Related Person" shall mean any individual, firm, corporation or
             other entity (other than the corporation or any Subsidiary) which,
             together with its Affiliates and Associates (as such terms are
             defined in Rule 12b-2 under the Exchange Act) and with any other
             individual, firm, corporation or other entity (other than the

                                      -11-

<PAGE>
 
             corporation or any Subsidiary) with which it or they have any
             agreement, arrangement or understanding with respect to acquiring,
             holding or disposing of Voting Stock, beneficially owns (as defined
             in Rule 13d-3 of the Exchange Act, except that such term shall
             include any Voting Stock which such person has the right to
             acquire, whether or not such right may be exercised within 60
             days), directly or indirectly, more than twenty percent of the
             voting power of the outstanding Voting Stock.

    (10)     "Subsidiary" shall mean any corporation in which a majority of the
             capital stock entitled to vote generally in the election of
             directors is owned, directly or indirectly, by the corporation.

    (11)     "Voting Stock" shall mean all of the then outstanding shares of the
             capital stock of the corporation entitled to vote generally in the
             election of directors.

     B.        In addition to the affirmative vote otherwise required by law
or any provision of this Certificate of Incorporation (including without
limitation Article Fifteenth), except as otherwise provided in Section C, any
Business Combination shall require the affirmative vote of the holders of 90% of
all Voting Stock, voting together as a single class.

     Such affirmative vote shall be required notwithstanding any other provision
of this Certificate of Incorporation or any provision of law or of any agreement
with any national securities exchange which might otherwise permit a lesser vote
or no vote, and such affirmative vote shall be required in addition to any
affirmative vote of the holders of any particular class or series of the Voting
Stock required by law or by this Certificate of Incorporation.

     C.        The provisions of Section B of this Article Seventeenth shall
not be applicable to any particular Business Combination, and such Business
Combination shall require only such affirmative vote as is required by law, any
other provision of this Certificate of Incorporation (including Article
Fifteenth), or any agreement with any national securities exchange, if, in the
case of a Business Combination that does not involve any Consideration Received
by the stockholders of the corporation, solely in their respective capacities as
stockholders of the corporation, the condition specified in the following
paragraph (1) is met, or, in the case of any other Business Combination, the
conditions specified in either of the following paragraphs (1) and (2) are met:

    (1)       The Business Combination shall have been approved by a majority of
              the Continuing Directors, it being understood that this condition
              shall not be capable of satisfaction unless there is at least one
              Continuing Director.

    (2)       All of the following conditions shall have been met:

              (i)    The form of the Consideration Received by holders of shares
                     of a particular class of outstanding Voting Stock shall be
                     in cash or in the same form as the Related Person has paid
                     for shares of such class of Voting

                                      -12-

<PAGE>
 
                     Stock within the two-year period ending on and including
                     the Determination Date. If, within such two-year period,
                     the Related Person has paid for shares of any class of
                     Voting Stock with varying forms of consideration, the form
                     of Consideration Received per share by holders of shares of
                     such class of Voting Stock shall be either cash or the form
                     used to acquire the largest number of shares of such class
                     of Voting Stock acquired by the Related Person within such
                     two-year period.

             (ii)    The aggregate amount of Consideration Received per share by
                     holders of each class of Voting Stock in such Business
                     Combination shall be at least equal to the higher of the
                     following (it being intended that the requirements of this
                     paragraph 2(ii) shall be required to be met with respect to
                     every such class of Voting Stock outstanding, whether or
                     not the Related Person has previously acquired any shares
                     of that particular class of Voting Stock):

                     (a)   (if applicable) the highest per share price
                           (including any brokerage commissions, transfer taxes
                           and soliciting dealers' fees) paid by the Related
                           Person for any shares of that class of Voting Stock
                           acquired by it within the two-year period immediately
                           prior to the Announcement Date or in the transaction
                           in which it became a Related Person, whichever is
                           higher; or

                     (b)   the Fair Market Value per share of such class of
                           Voting Stock on the Announcement Date; or

                     (c)   in the case of any class of preferred stock, the
                           highest preferential amount per share to which the
                           holders of shares of such class of Voting Stock are
                           entitled in the event of any voluntary or involuntary
                           liquidation, dissolution or winding up of the
                           corporation.

             (iii)   After such Related Person has become a Related Person and
                     prior to the consummation of such Business Combination: (a)
                     except as approved by a majority of the Continuing
                     Directors, there shall have been no failure to declare and
                     pay at the regular date therefor any full quarterly
                     dividends (whether or not cumulative) on any outstanding
                     preferred stock; (b) there shall have been (I) no reduction
                     in the annual rate of dividends paid on the Common Stock
                     (except as necessary to reflect any subdivision of the
                     Common Stock), except as approved by a majority of the
                     Continuing Directors, and (II) an increase in such annual
                     rate of dividends as necessary to reflect any
                     reclassification (including any reverse stock split),
                     recapitalization, reorganization or any similar transaction
                     which has the effect of reducing the number of outstanding
                     shares of the Common Stock, unless the failure so to
                     increase such annual rate is approved by a majority

                                      -13-

<PAGE>
 
                     of the Continuing Directors; and (c) such Related Person
                     shall have not become the beneficial owner of any newly
                     issued share of Voting Stock directly or indirectly from
                     the corporation except as part of the transaction which
                     results in such Related Person becoming a Related Person.

             (iv)    After such Related Person has become a Related Person, such
                     Related Person shall not have received the benefit,
                     directly or indirectly (except proportionately, solely in
                     such Related Person's capacity as a stockholder of the
                     corporation), of any loans, advances, guarantees, pledges
                     or other financial assistance or any tax credits or other
                     tax advantages provided by the corporation, whether in
                     anticipation of or in connection with such Business
                     Combination or otherwise.

             (v)     A proxy or information statement describing the proposed
                     Business Combination and complying with the requirements of
                     the Exchange Act and the rules and regulations thereunder
                     (or any subsequent provisions replacing such act, rules or
                     regulations) shall be mailed to all stockholders of the
                     corporation at least 30 days prior to the consummation of
                     such Business Combination (whether or not such proxy or
                     information statement is required to be mailed pursuant to
                     the Exchange Act or subsequent provisions). Such proxy or
                     information statement shall contain on the front thereof,
                     prominently displayed, any recommendation as to the
                     advisability or inadvisability of the Business Combination
                     which the Continuing Directors, or any of them, may have
                     furnished in writing to the board of directors.

     D.        A majority of the total number of authorized directors (whether
or not there exist any vacancies in previously authorized directorships at the
time any determination is to be made by the board of directors) shall have the
power and duty to determine, on the basis of information known to them after
reasonable inquiry, all facts necessary to determine compliance with this
Article Seventeenth including, without limitation, (1) whether a person is a
Related Person, (2) the number of shares of Voting Stock beneficially owned by
any person, (3) whether the applicable conditions set forth in paragraph (2) of
Section C have been met with respect to any Business Combination, and (4)
whether the assets which are the subject of any Business Combination or the
Consideration Received for the issuance or transfer of securities by the
corporation or any Subsidiary in any Business Combination have an aggregate Fair
Market Value of $500,000 or more.

     E.        Nothing contained in this Article Seventeenth shall be construed
to relieve any Related Person from any fiduciary obligation imposed by law.

     EIGHTEENTH: The corporation reserves the right to amend, alter, change or
     ----------                                                               
repeal any provision contained in this Certificate of Incorporation, in the
manner hereafter set forth, and all rights conferred upon stockholders herein
are granted subject to this reservation.

                                      -14-

<PAGE>
 
     A.     Except as provided in Sections B and C, any provision of this
Certificate of Incorporation may be amended, altered, changed or repealed in the
manner now or hereafter prescribed by statute.

     B.     Article Fifteenth may be amended only in accordance with the terms
thereof.

     C.     Notwithstanding any of the provisions of this Certificate of
Incorporation or any provision of law which might otherwise permit a lesser vote
or no vote, but in addition to any affirmative vote of holders of any particular
class or series of capital stock of the corporation required by law or this
Certificate of Incorporation, the affirmative vote of the holders of at least
the following percentages of all then outstanding shares of capital stock of the
corporation entitled to vote for the election of directors, voting together as a
single class, shall be required to amend, alter, change or repeal the indicated
provisions of this Certificate of Incorporation:

            (i)    80% in the case of any amendment, alteration, change or
                   repeal of Articles Fourteenth and Sixteenth; and

            (ii)   90% in the case of any amendment, alteration, change or
                   repeal of Article Seventeenth.

     Signed and attested to on October 20,  1995.
                                      ----



                                               /s/ Martin J. Reid
                                          ------------------------------------
                                          Martin J. Reid, President



Attest:

   /s/ Donald E. Paulson
- -------------------------------
Donald E. Paulson, Secretary

                                      -15-



<PAGE>
 
                        [CERTIFICATE APPEARS HERE]


                 [LOGO OF ALPHA INDUSTRIES, INC. APPEARS HERE]

         NUMBER                                                SHARES

        FBU 9589                                                    
                            ALPHA INDUSTRIES, INC. 
                                                           CUSIP 020753 10 9

                                                           SEE REVERSE FOR
                                                           CERTAIN DEFINITIONS

             INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE
THIS CERTIFICATE IS TRANSFERABLE IN BOSTON, MASSACHUSETTS OR NEW YORK, NEW YORK


THIS IS TO CERTIFY THAT



                                   SPECIMEN



is the owner of

FULLY PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK OF THE PAR VALUE OF $.25 
PER SHARE

of ALPHA INDUSTRIES, INC. (herein called the "Corporation") transferable on the 
books of the Corporation by the holder hereof in person or by duly authorized 
attorney upon surrender of this Certificate properly endorsed or assigned for 
transfer.  This Certificate and the shares represented hereby are issued and 
shall be subject to the laws of the State of Delaware and to the provisions of 
the Certificate of Incorporation and the By-Laws of the Corporation, as amended 
from time to time.  This Certificate is not valid until countersigned by the 
Transfer Agent and registered by the Registrar.

      WITNESS the facsimile seal of the Corporation and the facsimile signatures
of its duly authorized officers.

Dated


                              [SEAL APPEARS HERE]


               [SIGNATURE APPEARS HERE]                 [SIGNATURE APPEARS HERE]

                              TREASURER                                 CHAIRMAN


COUNTERSIGNED AND REGISTERED:
         THE FIRST NATIONAL BANK OF BOSTON
BY                                        TRANSFER AGENT 
                                           AND REGISTRAR


                                    AUTHORIZED SIGNATURE

<PAGE>
 
     The following abbreviations, when used in the inscription on the face of 
this certificate, shall be construed as though they were written out in full 
according to applicable laws or regulations:


<TABLE> 
<CAPTION>
     <S>                                              <C>  
     TEN COM -as tenants in common                    UNIF GIFT MIN ACT-.....Custodian....
     TEN ENT -as tenants by the entireties                         (Cust)           (Minor)
     JT TEN  -as joint tenants with right of                   under Uniform Gifts to Minors
              survivorship and not as tenants                  Act..................
              in common                                               (State)
</TABLE>
 

    Additional abbreviations may also be used though not in the above list.

        FOR VALUE RECEIVED,__________HEREBY SELL, ASSIGN AND TRANSFER UNTO

PLEASE INSERT SOCIAL SECURITY OR OTHER
 IDENTIFYING NUMBER OF ASSIGNEE
______________________________________


______________________________________



_______________________________________________________________________________ 
 (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

_______________________________________________________________________________ 


_______________________________________________________________________________ 


__________________________________________________________________________Shares
of the capital stock represented by the within Certificate, and do hereby 
irrevocably constitute and appoint

_______________________________________________________________________Attorney
to transfer the said stock on the books of the within named Corporation with 
full power of substitution in the premises.


Dated________________


                 _______________________________________________________________
                         THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND WITH 
                         THE NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE
                 NOTICE: IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT
                         OR ANY CHANGE WHATEVER.



Signature(s) Guaranteed:  __________________________________________________
                          THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE
                          GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS
                          AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH
                          MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE
                          MEDALLION PROGRAM), PURSUANT TO S.E.C. RULE 17Ad-15.

                                                 




This certificate also evidences and entitles the holder hereof to certain Rights
as set forth in a Rights Agreement, dated as of November 24, 1986 (the "Rights
Agreement"), between Alpha Industries, Inc. and The First National Bank of
Boston, as Rights Agent, the terms of which are hereby incorporated herein by
reference and a copy of which is on file at the principal executive offices of
Alpha Industries, Inc. Under certain circumstances, as set forth in the Rights
Agreement, such Rights may be redeemed, may expire, or may be evidenced by
separate certificates and no longer be evidenced by this certificate. Alpha
Industries, Inc. will mail or arrange for the mailing of a copy of the Rights
Agreement to the holder of this certificate without charge within five days
after the receipt of a written request therefor.



<PAGE>
 
[LOGO OF BROWN RUDNICK FREED & GESMER APPEARS HERE]


                               October 26, 1995



Alpha Industries, Inc.
20 Sylvan Road
Woburn, MA  01801

RE:  Alpha Industries, Inc.
     Registration Statement on Form S-3
     ----------------------------------

Ladies and Gentlemen:

   We have acted as legal counsel to Alpha Industries, Inc., a Delaware
corporation (the "Company"), in connection with the preparation and filing with
the Securities and Exchange Commission under the Securities Act of 1933, as
amended (the "Act"), of a Registration Statement on Form S-3 (the "Registration
Statement") relating to 2,300,000 shares (the "Shares") of the Company's Common
Stock, $.25 par value ("Common Stock"), and 2,300,000 Rights (as defined below).

   Pursuant to the Registration Statement and an underwriting agreement by and
between the Company, Montgomery Securities, Oppenheimer & Co., Inc. and Adams,
Harkness & Hill, Inc. (the "Underwriters"), in substantially the form filed as
Exhibit 1(a) to the Registration Statement (the "Underwriting Agreement"), the
Company proposes to sell to the Underwriters up to 2,300,000 Shares of Common
Stock.  The Rights are issuable pursuant to that certain Amended and Restated
Rights Agreement, dated as of November 24, 1986, as amended and restated July 3,
1990 and as amended through Amendment No. 2 dated
 September 24, 1990 (the
"Rights Agreement"), providing in effect for the delivery of a right (a
"Right"), along with each share of Common Stock issued by the Company pursuant
to the Underwriting Agreement.  This opinion is being rendered in connection
with the filing of the Registration Statement.

   In connection with this Opinion Letter, we have examined the documents listed
on Schedule A attached hereto (collectively, the "Documents").

   We have not made any independent review or investigation of orders,
judgments, rules or other regulations or decrees by which the Company or any of
its property may be bound, nor have we made any independent investigation as to
the existence of actions, suits, investigations or proceedings, if any, pending
or threatened against the Company.

<PAGE>
 
[LOGO OF BROWN RUDNICK FREED & GESMER APPEARS HERE]


Alpha Industries, Inc.
October 26, 1995
Page 2


   With your concurrence, the opinions hereafter expressed, whether or not
qualified by language such as "to our knowledge," are based solely upon (1) our
review of the Documents and (2) such review of published sources of law as we
have deemed necessary.

   This firm, in rendering legal opinions, customarily makes certain assumptions
which are described in Schedule B hereto.  In the course of our representation
of the Company in connection with the Registration Statement, nothing has come
to our attention which causes us to believe reliance upon any of those
assumptions is inappropriate and, with your concurrence, the opinions hereafter
expressed are based upon those assumptions.  For purposes of those assumptions,
the Enumerated Party referred to in Schedule B is the Company.

   Our opinions hereafter expressed are limited to the laws of the Commonwealth
of Massachusetts, Federal law and the General Corporation Law of the State of
Delaware.

   We express no legal opinion upon any matter other than as explicitly
addressed in numbered paragraphs 1 and 2 below, and our express opinions therein
contained shall not be interpreted to be implied opinions upon any other matter.

   Based upon and subject to the foregoing, we are of the opinion that:

   1.  The Shares have been duly authorized, and when issued and paid for in
accordance with the terms of the Underwriting Agreement, will be validly issued,
fully paid and nonassessable.

   2.  The Rights have been duly authorized, and when issued in accordance with
the Rights Agreement, will be validly issued, fully paid and nonassessable.

   We hereby consent to the filing of this opinion as Exhibit 5(a) to the
Registration Statement and to the reference to this firm wherever it appears in
the Registration Statement.

                        Very truly yours,

                        BROWN, RUDNICK, FREED & GESMER

                           By: Brown, Rudnick, Freed
                            & Gesmer, P.C., a partner

                             By: ___________________________________
                                 Steven R. London, a member duly authorized

SRL/DHM/JGN/mc

                                      -2-

<PAGE>
 
[LOGO OF BROWN RUDNICK FREED & GESMER APPEARS HERE]

                                  SCHEDULE A

                               LIST OF DOCUMENTS
                               -----------------


    In connection with the Opinion Letter to which this Schedule A is attached,
we have reviewed the Documents set forth below.  However, except as otherwise
expressly indicated, we have not reviewed any other documents, instruments or
agreements referred to in or listed upon any of the following Documents:

    (i) the Restated Certificate of Incorporation of the Company, as certified
by the Secretary of State of the State of Delaware, and a certificate of the
Secretary of the Company to the effect that there have been no further
amendments thereto;

    (ii) a copy of the Amended and Restated By-laws of the Company, certified by
the Secretary of the Company as presently being in effect;

    (iii) copies of certain votes of the board of directors of the Company,
certified by the Secretary of the Company as presently being in effect;

    (iv) a certificate dated as of a recent date of the Secretary of State of
the State of Delaware as to the good standing of the Company;

    (v)   the Rights Agreement;

    (vi)  the Registration Statement;

    (vii) the Underwriting Agreement; and

    (viii)  a letter dated October 17, 1995 from The First National Bank of
Boston, the Company's registrar and transfer agent, as to the issued and
outstanding shares of the Company.

                                      -3-

<PAGE>
 
[LOGO OF BROWN RUDNICK FREED & GESMER APPEARS HERE]
 
                                  SCHEDULE B

                        BROWN, RUDNICK, FREED & GESMER
                             STANDARD ASSUMPTIONS
                        -------------------------


    In rendering legal opinions in third party transactions, Brown, Rudnick,
Freed & Gesmer makes certain customary assumptions described below:


    1.   Each natural person executing any of the Documents has sufficient legal
         capacity to enter into such Documents.

    2.   Each person other than the Enumerated Party has all requisite power and
         authority and has taken all necessary corporate or other action to
         enter into the Documents to which it is a party or by which it is
         bound, to the extent necessary to make the Documents enforceable
         against it.

    3.   Each person other than the Enumerated Party has complied with all legal
         requirements pertaining to its status as such status relates to its
         rights to enforce the Documents against the Enumerated Party.

    4.   Each Document is accurate, complete and authentic, each original is
         authentic, each copy conforms to an authentic original and all
         signatures are genuine.

    5.   All official public records are accurate, complete and properly indexed
         and filed.

                                      -4-



<PAGE>
 
The Board of Directors
Alpha Industries, Inc.:
 
  We consent to the use of our report incorporated herein by reference and to
the references to our firm under the headings "Selected Consolidated Financial
Data" and "Experts" in the registration statement. Our report refers to the
adoption of Financial Accounting Standard Board's Statement of Financial
Accounting Standards No. 109, "Accounting for Income Taxes" in fiscal 1994.
 
Boston, Massachusetts
October 26, 1995