Exhibit 3 (1)
                            CERTIFICATE OF AMENDMENT

                                       OF

                          CERTIFICATE OF INCORPORATION

                                       OF

                               THERMO VOLTEK CORP.


             Thermo  Voltek  Corp.  (the  "Corporation"),  a  corporation
        organized and existing under the  laws of the State of  Delaware,
        hereby certifies  as  follows, pursuant  to  Section 242  of  the
        General Corporation Law of the State of Delaware:

             1.   That Article FOURTH of the Certificate of Incorporation
        of the Corporation, as  amended on November  12, 1992, is  hereby
        amended to  increase  the  number of  authorized  shares  of  the
        Corporation's Common Stock,  $0.05 par value  per share, from  10
        million shares to 25  million shares and  that such amendment  is
        hereby effected by amending the first sentence of said Article to
        read as follows:

             "FOURTH:  The total  number of  shares  of stock  which  the
                       Corporation  shall  have  authority  to  issue  is
                       twenty-five million (25,000,000)  shares, and  the
                       par  value  of  each  such  share  is  five  cents
                       ($0.05)."

             2.   That the Board  of Directors  of the  Corporation at  a
        meeting held  on  June  12,  1996,  duly  adopted  the  following
        resolutions:

        RESOLVED,      that  it  is   in  the  best   interests  of   the
                       Corporation that  the authorized  common stock  of
                       the Corporation, $.05 par  value, be increased  to
                       25 million shares, and that, upon the approval  of
                       such increase by  the Corporation's  Stockholders,
                       the proper  officers of  the Corporation  be,  and
                       each of them hereby are, authorized, empowered and
                       directed to execute on behalf of the Corporation a
                       Certificate  of  Amendment  to  the  Corporation's
                       Restated Certificate of  Incorporation to  reflect
                       such increase, and to file, or cause to be  filed,
                       such Certificate of  Amendment with the  Secretary
                       of State of the State of Delaware.

        RESOLVED,      that the  Board  of  Directors  recommend  to  the
                       Stockholders for approval at a Special Meeting  of
                       Stockholders to  be held  on  August 8,  1996  the
                       increase in authorized shares of the Corporation's
                       common stock to 25  million shares as approved  by
                       the Directors in the preceding resolution.
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             3.   That on August  8, 1996, at  the Corporation's  Special
        Meeting of  Stockholders,  the  Amendment  to  the  Corporation's
        Restated Certificate  of Incorporation  was duly  adopted by  the
        affirmative vote  of Stockholders  of the  Corporation holding  a
        majority of  the shares  of  Common Stock,  $0.05 par  value  per
        share, of the  Corporation in accordance  with the provisions  of
        Section 242  of  the General  Corporation  Law of  the  State  of
        Delaware.

             IN WITNESS WHEREOF, this  Certificate of Amendment has  been
        executed on behalf  of the  undersigned corporation  by its  duly
        authorized  officer  and  attested  to  by  its  duly  authorized
        Secretary this 15th day of August, 1996.


                                           THERMO VOLTEK CORP.

                                           By:  John W. Wood Jr.
                                                ----------------

                                                John W. Wood Jr.
                                                President and
                                                Chief Executive Officer


        ATTEST:

        By:  Sandra L. Lambert
             ----------------------------
             Sandra L. Lambert
             Secretary