SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
                   -------------------------------------------
                                    FORM 10-K

   (mark one)
   [ X ] Annual Report Pursuant to Section 13 or 15(d) of the Securities
         Exchange Act of 1934 for the fiscal year ended December 28, 1996

   [   ] Transition Report Pursuant to Section 13 or 15(d) of the Securities
         Exchange Act of 1934

                         Commission file number 1-10574

                               THERMO VOLTEK CORP.

             (Exact name of Registrant as specified in its charter)

   Delaware                                                        13-1946800
   (State or other jurisdiction of                           (I.R.S. Employer
   incorporation or organization)                         Identification No.)

   470 Wildwood Street, P.O. Box 2878
   Woburn, Massachusetts                                           01888-1578
   (Address of principal executive offices)                        (Zip Code)
       Registrant's telephone number, including area code: (617) 622-1000

           Securities registered pursuant to Section 12(b) of the Act:

          Title of each class        Name of each exchange on which registered
     ----------------------------    -----------------------------------------
     Common Stock, $.05 par value             American Stock Exchange

           Securities registered pursuant to Section 12(g) of the Act:
                                      None

   Indicate by check mark whether the Registrant (1) has filed all reports
   required to be filed by Section 13 or 15(d) of the Securities Exchange Act
   of 1934 during the preceding 12 months, and (2) has been subject to the
   filing requirements for at least the past 90 days. Yes [ X ]  No [   ]

   Indicate by check mark if disclosure of delinquent filers pursuant to Item
   405 of Regulation S-K is not contained herein, and will not be contained,
   to the best of the Registrant's knowledge, in definitive proxy or
   information statements incorporated by reference into Part III of this Form
   10-K or any amendment to this Form 10-K. [   ]

   The aggregate market value of the voting stock held by nonaffiliates of the
   Registrant as of January 24, 1997, was approximately $56,019,000.

   As of January 24, 1997, the Registrant had 9,759,238 shares of Common Stock
   outstanding.
                       DOCUMENTS INCORPORATED BY REFERENCE

   Portions of the Registrant's Annual Report to Shareholders for the year
   ended December 28, 1996, are incorporated by reference into Parts I and II.

   Portions of the Registrant's definitive Proxy Statement for the Annual
   Meeting of Shareholders to be held on June 2, 1997, are incorporated by
   reference into Part III.
PAGE

                                     PART I

    Item 1. Business

    (a) General Development of Business

        Thermo Voltek Corp. (the Company or the Registrant) designs,
    manufactures, and markets electromagnetic compatibility (EMC) testing
    instruments, high-voltage power-conversion systems, and programmable
    power amplifiers. The Company's EMC testing instruments simulate pulsed
    electromagnetic interference (pulsed EMI), radio frequency interference
    (RFI), and changes in AC voltage, to allow manufacturers of electronic
    systems and integrated circuits to test for resistance to those
    conditions. The Company's high-voltage power-conversion systems transform
    utility-supplied AC power into the DC voltages and currents required by
    the user. The Company's programmable power amplifiers have applications
    in EMC testing and other areas. The Company also provides EMC consulting
    and systems-integration services and distributes EMC-related products.

        The Company was originally incorporated in 1960 under the name
    Universal Voltronics Corp. Thermedics Inc. (Thermedics), a publicly
    traded subsidiary of Thermo Electron Corporation (Thermo Electron),
    acquired a controlling interest in the Company's common stock in March
    1990. In November 1992, the Company's name was changed to Thermo Voltek
    Corp. As of December 28, 1996, Thermedics owned 4,971,333 shares of the
    Company's common stock, representing 51% of such stock outstanding. In
    addition to the Company's products, Thermedics develops, manufactures,
    and markets product quality assurance systems, precision-weighing and
    inspection equipment, electrochemistry and microweighing products,
    explosives-detection devices, and moisture-analysis systems, as well as
    implantable heart-assist systems and other biomedical products. As of
    December 28, 1996, Thermo Electron owned 51,700 shares of the Company's
    common stock, representing 0.53% of such stock outstanding. These shares
    were purchased during 1996* in the open market for a total purchase price
    of $569,000. Thermo Electron is a world leader in environmental
    monitoring and analysis instruments, biomedical products such as
    heart-assist devices and mammography systems, papermaking and
    paper-recycling equipment, biomass electric power generation, and other
    specialized products and technologies. Thermo Electron also provides a
    range of services related to environmental quality.

        Thermedics intends, for the foreseeable future, to maintain at least
    50% ownership of the Company. This may require the purchase by Thermedics
    of additional shares (or convertible debentures that are then converted)
    of the Company from time to time as the number of outstanding shares of
    the Company increases. These or any other purchases by Thermedics may be
    made either in the open market or directly from the Company or Thermo
    Electron or pursuant to conversions of the subordinated convertible
    debentures issued by the Company to Thermedics. During 1996, Thermedics
    purchased 291,450 shares of the Company's common stock in the open market
    for a total purchase price of $4,169,000. See Notes 4 and 8 to
    Consolidated Financial Statements in the Company's 1996 Annual Report to
    Shareholders for a description of outstanding stock options and
    convertible obligations issued by the Company.

    * References to 1996, 1995, and 1994 herein are for the fiscal years
      ended December 28, 1996, December 30, 1995, and December 31, 1994,
      respectively.
                                        2PAGE

    Forward-looking Statements

        Forward-looking statements, within the meaning of Section 21E of the
    Securities Exchange Act of 1934, are made throughout this Annual Report
    on Form 10-K. For this purpose, any statements contained herein that are
    not statements of historical fact may be deemed to be forward-looking
    statements. Without limiting the foregoing, the words "believes,"
    "anticipates," "plans," "expects," "seeks," "estimates," and similar
    expressions are intended to identify forward-looking statements. There
    are a number of important factors that could cause the results of the
    Company to differ materially from those indicated by such forward-looking
    statements, including those detailed under the caption "Forward-looking
    Statements" in the Registrant's 1996 Annual Report to Shareholders
    incorporated herein by reference.

    (b) Information About Industry Segments

        The Company conducts business in one industry segment.

    (c) Description of Business

    Electronic Test Instruments and Services

        The Company designs, manufactures, and markets electromagnetic
    compatibility (EMC) testing instruments and programmable power
    amplifiers. The Company's EMC testing instruments simulate pulsed
    electromagnetic interference (pulsed EMI), radio frequency interference
    (RFI), and changes in AC voltage, to allow manufacturers of electronic
    systems and integrated circuits to test for resistance to those
    conditions. The Company's programmable power amplifiers have applications
    in EMC testing and other areas. The Company also provides EMC consulting
    and systems-integration services and distributes EMC-related products.
    The market for EMC-testing equipment has developed due to the
    proliferation of digital electronics. Manufacturers of electronic systems
    and integrated circuits must engineer their products for immunity to
    pulsed EMI. The Company's products are used by these customers primarily
    for product development, design verification, and quality assurance,
    enabling them to meet higher levels of product performance, reliability,
    and safety, and to meet regulatory requirements, including a European
    Union (EU) directive that took effect on January 1, 1996, and industry
    standards.

        The Company's EMC testing equipment falls into two main categories:
    (1) equipment to test completed electronic products and (2) equipment to
    test individual electronic components such as integrated circuits. The
    Company also manufactures power amplifiers and power-conversion systems
    for use in telecommunications equipment, and products that test for
    immunity to certain types of power quality failure. In addition, the
    Company offers EMC-consulting and systems-integration services and
    distributes a broad range of EMC-related products.

                                        3PAGE

        Product Testing Equipment. In 1992, the Company's KeyTek Instrument
    (KeyTek) division introduced its ECAT(R) system, which integrates
    comprehensive pulsed EMI and power quality failure simulation and testing
    with built-in diagnostic capabilities. KeyTek also offers a range of
    lower-cost instruments designed to test completed products for a
    particular type of pulsed EMI. In 1994, the Company's Comtest Europe B.V.
    (Comtest) subsidiary, acquired in 1993, introduced its first commercial
    product. Called the G-Strip, this product, a radio frequency interference
    (RFI) immunity tester, analyzes how effectively electronics resist the
    effects of radio frequency emitted by other electronic devices.

        Component Testing Equipment. Both the Verifier division of Comtest
    and KeyTek manufacture a range of products that utilize its electrostatic
    discharge (ESD) simulation technology to test integrated circuits and
    printed circuit boards for pulsed EMI immunity during product
    development, design verification, and quality assurance.

        Power Amplifiers. On March 1, 1995, the Company acquired the assets
    of Kalmus Engineering Incorporated, a manufacturer of RF power amplifiers
    used to test products for immunity to conducted and radiated RFI. RF
    power amplifiers also are used in a variety of laboratory and test
    applications where precise control over power level and frequency are
    required; in medical imaging applications; and in wireless communications
    applications, broadcasting, and mobile data communications. On July 8,
    1996, the Company acquired Pacific Power Source Corporation, a
    manufacturer of programmable power amplifiers that can be incorporated
    into EMC test equipment to assess how well electronics tolerate normal
    variations in the quality and quantity of AC voltage. These amplifiers
    are also used in other kinds of testing equipment and in
    application-specific power supplies.

        EMC Services. Through Comtest, the Company distributes EMC-testing
    products for pulsed EMI and RFI immunity and emissions testing; provides
    a wide range of testing, consulting, training, and systems-integration
    services; and designs EMC test facilities. The Company also provides
    on-site management and service, and maintains testing and training
    facilities, at Comtest's Netherlands headquarters.

        Telecommunications Power Supplies. Comtest manufactures specialized
    power supplies that are used in telecommunications equipment to maintain
    consistent power quality. These systems are of critical importance in
    areas of the world where utility-supplied power cannot be relied upon to
    maintain adequate power quality to operate telecommunications equipment.

        Revenues from electronic test instruments and services were
    $44,081,000, $31,580,000, and $19,009,000, in 1996, 1995, and 1994,
    respectively.

                                        4PAGE

    High-voltage Systems

        Through its Universal Voltronics division, the Company designs,
    manufactures, and markets high-voltage power-conversion systems,
    modulators, and related high-voltage equipment for industrial, medical,
    and security processes, and defense and scientific research applications.
    These systems transform utility-supplied AC power into the DC voltages
    and currents required by the user and allow precise control over the
    performance level desired for each application.

        Revenues from high-voltage systems were $4,426,000, $4,746,000, and
    $4,632,000, in 1996, 1995, and 1994, respectively.

    Raw Materials

        A number of the components of the Company's EMC-testing products are
    supplied by sole-source vendors. While the Company has not experienced
    significant difficulty in obtaining adequate supplies from these vendors,
    and believes that it would be able to identify alternate suppliers if
    necessary, there can be no assurance that the unanticipated loss of a
    single vendor would not result in delays in shipments or in the
    introduction of new products.

    Backlog

        The Company's backlog of firm orders is measured by the amount of
    unshipped orders and, with respect to long-term contracts, the amount of
    the contract reduced by the revenue that has been recognized to date on a
    percentage-of-completion basis. The Company's backlog was $10.3 million
    and $13.0 million as of December 28, 1996, and December 30, 1995,
    respectively. The Company believes that substantially all of the backlog
    at December 28, 1996, will be shipped or completed during the next 12
    months.

    Competition
        The Company is a leading supplier of pulsed EMI testing equipment.
    There are numerous companies worldwide that independently manufacture and
    market pulsed EMI test equipment for electronic products, and several
    more that independently manufacture and market component-reliability test
    equipment. The Company competes in this market primarily on the basis of
    performance, technical expertise, reputation, and price.

        In the market for RF power amplifiers and programmable power
    amplifiers, the Company competes with several companies worldwide based
    primarily on technical expertise, reputation, and price.

        In the market for high-voltage power supply systems of the general
    type manufactured and marketed by the Company, the Company competes with
    numerous companies for both contract and commercial sales primarily on
    the basis of technical expertise, product performance, reputation, and
    price.

                                        5PAGE

        Substantially all of the Company's contract and commercial revenues
    are subject to intense competitive bidding. Some of the Company's
    competitors have substantially greater financial resources than those of
    the Company.

    Research and Development

        Research and development expenses for the Company were $3,618,000,
    $2,349,000, and $1,492,000 in 1996, 1995, and 1994, respectively.

    Environmental Protection Regulations

        The Company believes that compliance by the Company with federal,
    state, and local environmental protection regulations will not have a
    material adverse effect on its capital expenditures, earnings, or
    competitive position.

    Number of Employees

        As of December 28, 1996, the Company employed 299 people. Except for
    10 employees at Universal Voltronics, none of the Company's employees is
    represented by a union. The Company believes that relations with its
    employees are good.

    (d) Financial Information About Exports by Domestic Operations and
        About Foreign Operations

        Financial information about exports by domestic operations and about
    foreign operations is summarized in Note 11 to Consolidated Financial
    Statements in the Registrant's 1996 Annual Report to Shareholders and is
    incorporated herein by reference.

    (e) Executive Officers of the Registrant

                                       Present Title (Year First Became
    Name                        Age    Executive Officer)
    ------------------------    ---    ------------------------------------
    John W. Wood Jr.            53     Chairman of the Board and Chief
                                         Executive Officer (1990)
    Colin I.W. Baxter           65     President and Chief Operating
                                         Officer (1997)
    Michael D. Norton           44     Vice President (1992)
    Dominick R. Congiusti       68     Vice President (1994)
    John N. Hatsopoulos         62     Chief Financial Officer (1990)
    Paul F. Kelleher            54     Chief Accounting Officer (1990)
        Each executive officer serves until his successor is chosen or
    appointed by the Board of Directors and qualified or until his earlier
    resignation, death, or removal. Messrs. Wood, Hatsopoulos, and Kelleher
    have held comparable positions for at least five years either with the
    Company, Thermedics, or Thermo Electron. Mr. Baxter has been President
    and Chief Operating Officer of the Company since January 1997. Mr. Baxter
    has been President of the Company's Kalmus division since May 1995, and
    from July 1996 to January 1997 was President of the Company's Pacific 

                                        6PAGE

    Power division. Prior to joining the Company, Mr. Baxter was President
    and Chief Executive Officer of Dranetz Technologies, Inc., a designer and
    manufacturer of electronic instruments for measuring and monitoring
    electrical power quality, demand, and sequence of events recorders. Mr.
    Norton has been a Vice President of the Company since December 1992, and
    has held various positions at KeyTek since 1987, most recently serving as
    President from January 1993 to January 1997. Mr. Congiusti has been a
    Vice President of the Company since December 1994. He has been President
    of Universal Voltronics since December 1993, was Vice President of
    Operations of Universal Voltronics from 1992 to 1993, and Director of
    Manufacturing of Universal Voltronics from 1991 to 1992. Mr. Wood is a
    Senior Vice President of Thermo Electron and the President and Chief
    Executive Officer of Thermedics but devotes such portion of his time to
    the affairs of the Company as the Company's needs reasonably require.
    Messrs. Hatsopoulos and Kelleher are full-time employees of Thermo
    Electron but devote such time to the affairs of the Company as the
    Company's needs reasonably require.


    Item 2. Properties

        The Company owns approximately 45,000 square feet of office,
    engineering, laboratory, and production space in Mount Kisco, New York,
    and leases approximately 100,000 square feet of office, engineering,
    laboratory, and production space under leases expiring from 1997 to 2003,
    principally in Massachusetts, Washington, California, The Netherlands,
    and the United Kingdom. The Company believes that these facilities are in
    good condition and are suitable and adequate for its present operations,
    and that suitable space is readily available if any of such leases are
    not extended.


    Item 3. Legal Proceedings

        Not applicable.


    Item 4. Submission of Matters to a Vote of Security Holders

        Not applicable.









                                        7PAGE

                                     PART II

    Item 5. Market for Registrant's Common Equity and Related Stockholder
            Matters

        Information concerning the market and market price for the
    Registrant's common stock, $.05 par value, and dividend policy is
    included under the sections labeled "Common Stock Market Information" and
    "Dividend Policy" in the Registrant's 1996 Annual Report to Shareholders
    and is incorporated herein by reference.


    Item 6. Selected Financial Data

        The information required under this item is included under the
    sections labeled "Selected Financial Information" and "Dividend Policy"
    in the Registrant's 1996 Annual Report to Shareholders and is
    incorporated herein by reference.


    Item 7. Management's Discussion and Analysis of Financial Condition and  
            Results of Operations

        The information required under this item is included under the
    heading "Management's Discussion and Analysis of Financial Condition and
    Results of Operations" in the Registrant's 1996 Annual Report to
    Shareholders and is incorporated herein by reference.


    Item 8. Financial Statements and Supplementary Data

        The Registrant's Consolidated Financial Statements as of December 28,
    1996, and Supplementary Data are included in the Registrant's 1996 Annual
    Report to Shareholders and are incorporated herein by reference.


    Item 9. Changes in and Disagreements with Accountants on Accounting and
            Financial Disclosure

        Not applicable.








                                        8PAGE

                                    PART III

    Item 10. Directors and Executive Officers of the Registrant

        The information concerning directors required under this item is
    incorporated herein by reference from the material contained under the
    caption "Election of Directors" in the Registrant's definitive proxy
    statement to be filed with the Securities and Exchange Commission
    pursuant to Regulation 14A, not later than 120 days after the close of
    the fiscal year. The information concerning delinquent filers pursuant to
    Item 405 of Regulation S-K is incorporated herein by reference from the
    material contained under the heading "Section 16(a) Beneficial Ownership
    Reporting Compliance" under the caption "Stock Ownership" in the
    Registrant's definitive proxy statement to be filed with the Securities
    and Exchange Commission pursuant to Regulation 14A, not later than 120
    days after the close of the fiscal year.


    Item 11. Executive Compensation

        The information required under this item is incorporated herein by
    reference from the material contained under the caption "Executive
    Compensation" in the Registrant's definitive proxy statement to be filed
    with the Securities and Exchange Commission pursuant to Regulation 14A,
    not later than 120 days after the close of the fiscal year.


    Item 12. Security Ownership of Certain Beneficial Owners and Management

        The information required under this item is incorporated herein by
    reference from the material contained under the caption "Stock Ownership"
    in the Registrant's definitive proxy statement to be filed with the
    Securities and Exchange Commission pursuant to Regulation 14A, not later
    than 120 days after the close of the fiscal year.


    Item 13. Certain Relationships and Related Transactions

        The information required under this item is incorporated herein by
    reference from the material contained under the caption "Relationship
    with Affiliates" in the Registrant's definitive proxy statement to be
    filed with the Securities and Exchange Commission pursuant to Regulation
    14A, not later than 120 days after the close of the fiscal year.




                                        9PAGE

                                     PART IV

    Item 14. Exhibits, Financial Statement Schedules, and Reports on Form 8-K

       (a,d) Financial Statements and Schedules

             (1) The consolidated financial statements set forth in the list
                 below are filed as part of this Report.

             (2) The consolidated financial statement schedule set forth in
                 the list below is filed as part of this Report.

             (3) Exhibits filed herewith or incorporated herein by reference
                 are set forth in Item 14(c) below.

             List of Financial Statements and Schedules Referenced in this
             Item 14

             Information incorporated by reference from Exhibit 13 filed
             herewith:

                 Consolidated Statement of Income
                 Consolidated Balance Sheet
                 Consolidated Statement of Cash Flows
                 Consolidated Statement of Shareholders' Equity
                 Notes to Consolidated Financial Statements
                 Report of Independent Public Accountants

             Financial Statement Schedules filed herewith:

                 Schedule II: Valuation and Qualifying Accounts

             All other schedules are omitted because they are not applicable
             or not required, or because the required information is shown
             either in the financial statements or in the notes thereto.

         (b)Reports on Form 8-K

            None.

         (c)Exhibits

            See Exhibit Index on the page immediately preceding exhibits.



                                       10PAGE

                                   SIGNATURES

        Pursuant to the requirements of Section 13 or 15(d) of the Securities
    Exchange Act of 1934, the Registrant has duly caused this report to be
    signed on its behalf by the undersigned, thereunto duly authorized.

    Date: March 14, 1997                    THERMO VOLTEK CORP.



                                            By: John W. Wood Jr.
                                                -------------------
                                                John W. Wood Jr.
                                                Chief Executive Officer

        Pursuant to the requirements of the Securities Exchange Act of 1934,
    this report has been signed below by the following persons on behalf of
    the Registrant and in the capacities indicated below, as of March 14,
    1997.

    Signature                          Title
    ---------                          -----

    By: John W. Wood Jr.               Chairman of the Board, Chief Executive
        ---------------------
        John W. Wood Jr.                 Officer, and Director

    By: John N. Hatsopoulos            Vice President and Chief Financial
        ---------------------
        John N. Hatsopoulos              Officer

    By: Paul F. Kelleher               Chief Accounting Officer
        ---------------------
        Paul F. Kelleher

    By  Elias P. Gyftopoulos           Director
        ---------------------
        Elias P. Gyftopoulos

    By: William W. Hoover              Director
        ---------------------
        William W. Hoover

    By: Sandra L. Lambert              Director
        ---------------------
        Sandra L. Lambert

    By: Theo Melas-Kyriazi             Director
        ---------------------
        Theo Melas-Kyriazi

    By: Peter Richman                  Director
        ---------------------
        Peter Richman
                                       11PAGE

                    Report of Independent Public Accountants


    To the Shareholders and Board of Directors of Thermo Voltek Corp.:

        We have audited, in accordance with generally accepted auditing
    standards, the consolidated financial statements included in Thermo
    Voltek Corp.'s Annual Report to Shareholders incorporated by reference in
    this Form 10-K, and have issued our report thereon dated February 6,
    1997. Our audits were made for the purpose of forming an opinion on those
    statements taken as a whole. The schedule listed in Item 14 on page 10 is
    the responsibility of the Company's management and is presented for
    purposes of complying with the Securities and Exchange Commission's rules
    and is not part of the basic consolidated financial statements. This
    schedule has been subjected to the auditing procedures applied in the
    audits of the basic consolidated financial statements and, in our
    opinion, fairly states in all material respects the consolidated
    financial data required to be set forth therein in relation to the basic
    consolidated financial statements taken as a whole.



                                            Arthur Andersen LLP



    Boston, Massachusetts
    February 6, 1997








                                       12PAGE

   SCHEDULE II

                               THERMO VOLTEK CORP.

                        Valuation and Qualifying Accounts
                                 (In thousands)


                            Balance Provision                         Balance
                                 at   Charged  Accounts                    at
                          Beginning        to   Written                End of
   Description              of Year   Expense       Off   Other (a)      Year
   --------------------------------------------------------------------------
   Year Ended
     December 28, 1996

       Allowance for
         Doubtful Accounts     $446      $103      $(11)      $49        $587

   Year Ended
     December 30, 1995

       Allowance for
         Doubtful Accounts     $343      $135      $(51)      $ 19       $446

   Year Ended
     December 31, 1994

       Allowance for
         Doubtful Accounts     $354      $101      $(147)     $ 35       $343

   (a) Allowances of businesses acquired during the year as described in Note
       3 to Consolidated Financial Statements in the Registrant's 1996 Annual
       Report to Shareholders and the effect of foreign currency translation.







                                       13PAGE

                                  EXHIBIT INDEX

    Exhibit
    Number       Description of Exhibit
    ------------------------------------------------------------------------

      2.1        Asset Purchase Agreement dated March 1, 1995, among KeyTek
                 Instrument Division of Thermo Voltek Corp., Kalmus
                 Engineering Incorporated, RF Power Labs, Incorporated, and
                 Frank Kalmus (filed as Exhibit 2.4 to the Registrant's
                 Annual Report on Form 10-K for the year ended December 31,
                 1994 [File No. 1-10574] and incorporated herein by
                 reference). Pursuant to Item 601(b)(2) of Regulation S-K,
                 schedules to this Agreement have been omitted. The Company
                 hereby undertakes to furnish supplementally a copy of such
                 schedules to the Commission upon request.

      2.2        Asset Purchase Agreement dated as of July 3, 1996,
                 between the Registrant and Pacific Power Source
                 Corporation (filed as Exhibit 2.1 to the Registrant's
                 Quarterly Report on Form 10-Q for the quarter ended
                 June 29, 1996 [File No. 1-10574] and incorporated
                 herein by reference). Pursuant to Item 601(b)(2) of
                 Regulation S-K, schedules to this Agreement have been
                 omitted. The Company hereby undertakes to furnish
                 supplementally a copy of such schedules to the
                 Commission upon request.

      3.1        Restated Certificate of Incorporation of the
                 Registrant, as amended (filed as Exhibit 3.1 to the
                 Registrant's Annual Report on Form 10-K for the year
                 ended January 2, 1993 [File No. 1-10574] and
                 incorporated herein by reference).

      3.2        Composite Restatement of By-Laws, as amended (filed as
                 Exhibit 3.2 to the Registrant's Transition Report on
                 Form 10-K for the six months ended December 29, 1990
                 [File No. 1-10574] and incorporated herein by
                 reference).

      4.1        Agreement between the Registrant and Thermedics dated
                 June 5, 1992, for Purchase of Note (filed as Exhibit 4
                 to the Registrant's Current Report on Form 8-K dated
                 June 5, 1992 [File No. 1-10574] and incorporated
                 herein by reference).

      4.2        Fiscal Agency Agreement dated as of November 19, 1993,
                 among the Registrant, Thermo Electron, and Chemical
                 Bank (filed as Exhibit 4.3 to the Registrant's Annual
                 Report on Form 10-K for the fiscal year ended January
                 1, 1994 [File No. 1-10574] and incorporated herein by
                 reference).


                                       14PAGE

                                  EXHIBIT INDEX

    Exhibit
    Number       Description of Exhibit
    ------------------------------------------------------------------------

      4.3        Guarantee Reimbursement Agreement dated February 7, 1994,
                 among the Registrant, Thermedics, Thermo Cardiosystems
                 Inc., and Thermo Electron (filed as Exhibit 4.4 to
                 Thermedics' Annual Report on Form 10-K for the fiscal year
                 ended January 1, 1994 [File No. 1-9567] and incorporated
                 herein by reference).

     10.1        Amended and Restated Corporate Services Agreement dated
                 January 3, 1993, between Thermo Electron and the Registrant
                 (filed as Exhibit 10.3 to the Registrant's Annual Report on
                 Form 10-K for the year ended January 2, 1993 [File No.
                 1-10574] and incorporated herein by reference).

     10.2        Form of Indemnification Agreement for Directors and
                 Officers of the Registrant (filed as Exhibit 10.13 to the
                 Registrant's Transition Report on Form 10-K for the six
                 months ended December 29, 1990 [File No. 1-10574] and
                 incorporated herein by reference).

     10.3        Thermo Electron Corporate Charter as amended and restated
                 effective January 3, 1993 (filed as Exhibit 10.5 to the
                 Registrant's Annual Report on Form 10-K for the year ended
                 January 2, 1993 [File No. 1-10574] and incorporated herein
                 by reference).

     10.4        Consulting Agreement between the Registrant and Peter
                 Richman, as of August 5, 1993 (filed as Exhibit 10.25 to
                 the Registrant's Quarterly Report on Form 10-Q for the
                 quarter ended July 3, 1993 [File No. 1-10574] and
                 incorporated herein by reference).

     10.5        Lease Agreement dated August 2, 1993, between Comtest
                 Invest B.V. and Comtest Instrumentation B.V. (filed as
                 Exhibit 10.6 to the Registrant's Annual Report on Form 10-K
                 for the fiscal year ended January 1, 1994 [File No.
                 1-10574] and incorporated herein by reference).

     10.6        Note dated July 2, 1993, from the Registrant to Thermo
                 Electron Corporation (filed as Exhibit 10.7 to the
                 Registrant's Annual Report on Form 10-K for the fiscal year
                 ended January 1, 1994 [File No. 1-10574] and incorporated
                 herein by reference).

     10.7        Amended and Restated Master Repurchase Agreement dated as
                 of July 2, 1996, between the Registrant and Thermo
                 Electron.

    10.8 - 10.18 Reserved.


                                       15PAGE

                                  EXHIBIT INDEX

    Exhibit
    Number       Description of Exhibit
    ------------------------------------------------------------------------

     10.19       1985 Stock Option Plan of the Registrant (filed as Exhibit
                 10.14 to the Registrant's Annual Report on Form 10-K for
                 the fiscal year ended June 30, 1985 [File No. 0-8245] and
                 incorporated herein by reference). (Maximum number of
                 shares issuable is 300,000 shares, after adjustment to
                 reflect 1-for-3 reverse stock split effected in November
                 1992 and 3-for-2 stock splits effected in November 1993 and
                 August 1996.)

     10.20       1990 Stock Option Plan, as amended, of the Registrant
                 (filed as Exhibit 10.2 to the Registrant's Quarterly Report
                 on Form 10-Q for the quarter ended July 2, 1994 [File No.
                 1-10574] and incorporated herein by reference). (Maximum
                 number of shares issuable is 600,000 shares, after
                 adjustment to reflect share increases in 1993 and 1994,
                 1-for-3 reverse stock split effected in November 1992, and
                 3-for-2 stock splits effected in November 1993 and August
                 1996.)

     10.21       Equity Incentive Plan of the Registrant (filed as Exhibit
                 10.49 to the Registrant's Annual Report on Form 10-K for
                 the year ended December 31, 1994 [File No. 1-11406] and
                 incorporated herein by reference).

                 In addition to the stock-based compensation plans of the
                 Registrant, the executive officers of the Registrant may be
                 granted awards under stock-based compensation plans of
                 Thermo Electron and Thermedics for services rendered to the
                 Registrant or such affiliated corporations. Thermo
                 Electron's plans were filed as Exhibits 10.21 through 10.44
                 to the Annual Report on Form 10-K of Thermo Electron for
                 the fiscal year ended December 30, 1995, [File No. 1-8002]
                 and as Exhibit 10.19 to the Annual Report on Form 10-K of
                 Trex Medical Corporation for the fiscal year ended
                 September 28, 1996 [File No. 1-11827], and Thermedics'
                 plans were filed as Exhibits 10.18 through 10.22 to the
                 Annual Report on Form 10-K of Thermedics for the fiscal
                 year ended December 28, 1996 [File No. 1-9567], and are
                 incorporated herein by reference.

     10.22       Deferred Compensation Plan for Directors of the Registrant
                 (filed as Exhibit 10.23 to the Registrant's Quarterly
                 Report on Form 10-Q for the quarter ended July 3, 1993
                 [File No. 1-10574] and incorporated herein by reference).

     10.23       Directors' Stock Option Plan of the Registrant (filed as
                 Exhibit 10.23 to the Registrant's Annual Report on Form
                 10-K for the year ended December 31, 1994 [File No.
                 1-11406] and incorporated herein by reference). 


                                       16PAGE

                                  EXHIBIT INDEX

    Exhibit
    Number       Description of Exhibit
    ------------------------------------------------------------------------

     10.24       Restated Stock Holdings Assistance Plan and Form of
                 Promissory Note.

     11          Statement re: Computation of Earnings per Share.

     13          Annual Report to Shareholders for the year ended December
                 28, 1996 (only those portions incorporated herein by
                 reference).

     21          Subsidiaries of the Registrant.

     23          Consent of Arthur Andersen LLP.

     27          Financial Data Schedule.