Document:

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                                                                   Exhibit 10.35

                   AMENDMENT AGREEMENT NO. 7 TO SECOND AMENDED
                          AND RESTATED CREDIT AGREEMENT

         This AMENDMENT AGREEMENT NO. 7 (this "Amendment"), dated as of March 9,
2000, by and among SIGNAL TECHNOLOGY CORPORATION, a Delaware corporation
("STC"), SIGNAL TECHNOLOGY SALES CORP., a United States Virgin Islands
corporation ("Sales" and, together with STC, the "Companies"), and FLEET
NATIONAL BANK, a national banking association formerly known as BankBoston, N.A
and as The First National Bank of Boston (the "Bank"), amends the Second Amended
and Restated Credit Agreement dated as of September 30, 1993, as amended (as the
same may be further amended, modified, or supplemented from time to time the
"Credit Agreement"), by and among the Companies and the Bank. Capitalized terms
used but not defined herein shall have the meanings set forth for such terms in
the Credit Agreement.

         WHEREAS, the Companies have requested that the Bank agree to certain
amendments to the Credit Agreement; and

         WHEREAS, subject to the terms and provisions hereof, the Bank is
willing to so amend the Credit Agreement;

         NOW, THEREFORE, the parties hereto hereby agree as follows:

         Section 1. AMENDMENT TO CREDIT AGREEMENT. Subject to the satisfaction
of the conditions precedent set forth in Section 3 hereof, the Credit Agreement
is hereby amended as follows:

                  (a) The definition of the term "Bank" is hereby amended to
         read as follows:

                  "BANK - Fleet National Bank, a national banking association."

                  (b) AMENDMENT OF SECTION 2.1. Section 2.1 of the Credit
         Agreement is hereby amended effective as of February 22, 2000 to read
         in its entirety as follows:

                  "ss.2.1 COMMITMENT TO LEND. Subject to the terms and
         conditions hereinafter set forth, the Bank agrees to lend to the
         Companies, on a joint and several basis, during the period commencing
         on the Effective date and ending on the Revolving Credit Maturity Date,
         upon notice by the Companies pursuant to ss.2.4 from time to time an
         amount (a "Revolving Credit Loan", or if more than one, "Revolving
         Credit Loans") equal to the aggregate principal amount of the Revolving
         Credit Loan requested by the Companies in such notice, for working
         capital and general corporate purposes as permitted pursuant to the
         provisions of this Agreement, PROVIDED that in no event shall the sum
         of (a) the aggregate

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         outstanding principal balance of all Revolving Credit Loans (after
         giving effect to all amounts requested), plus (b) the aggregate Maximum
         Drawing Amount of Letters of Credit outstanding (collectively the
         "Total Credit Extended"), exceed at any one time the Revolving Credit
         Commitment Amount."

                  (c) AMENDMENT OF SECTION 11.4. Section 11.4(g) of the Credit
         Agreement is hereby amended effective as of February 22, 2000 to read
         in its entirety as follows:

                  "(g) [Omitted]; and"

                  (d) AMENDMENT OF SECTION 12.7. Section 12.7 of the Credit
         Agreement is hereby amended to read in its entirety as follows:

                  "ss.12.7 NET WORTH. Permit at any time Consolidated Tangible
         Net Worth to be less than the amount equal to the sum of $23,000,000
         plus, on a cumulative basis, 50% of positive Consolidated Net Income
         for each fiscal quarter ending after December 31, 1999 (without
         deduction for any fiscal quarter in which Consolidated Net Income is
         negative)."

         Section 2. REPRESENTATIONS AND WARRANTIES. The Companies hereby
represent and warrant to the Bank as follows:

                  (a) REPRESENTATIONS AND WARRANTIES IN CREDIT AGREEMENT. Except
         as specified in writing by the Companies to the Bank with respect to
         the subject matter of this Amendment prior to the execution and
         delivery hereof by the Bank and the Companies, the representations and
         warranties of the Companies contained in the Credit Agreement were true
         and correct in all material respects when made and continued to be true
         and correct in all material respects on the date hereof, except, in
         each case to the extent of changes resulting from transactions
         contemplated or permitted by the Loan Documents and this Amendment, and
         changes occurring in the ordinary course of business which singly or in
         the aggregate are not materially adverse, and to the extent that such
         representations and warranties relate expressly to an earlier date.

                  (b) AUTHORITY, NO CONFLICTS, ENFORCEABILITY OF OBLIGATIONS,
         ETC. Each of the Companies hereby confirms that the representations and
         warranties of the Companies contained in Sections 8.1 and 8.3 of the
         Credit Agreement are true and correct on and as of the date hereof as
         if made on the date hereof, treating this Amendment, the Credit
         Agreement as amended hereby, and the other Loan Documents as amended
         hereby, as "Loan Documents" for the purposes of making said
         representations and warranties.

         Section 3. CONDITIONS TO EFFECTIVENESS. The effectiveness of this
Amendment shall be subject to the delivery to the Bank by (or on behalf of) each
of the Companies, as the case

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may be, contemporaneously with the execution hereof, of the following, in form
and substance satisfactory to the Bank:

                  (a) this Amendment signed by each of the Companies and the
         Bank; and

                  (b) any other confirmatory or corporate authority document or
         instrument the Bank may reasonably request.

         Section 4. WAIVER OF NONCOMPLIANCE WITH COVENANTS. The Bank hereby
waives the Companies' noncompliance with Section 12.7 of the Credit Agreement
(as in effect immediately prior to giving effect to this Amendment) for the
period ended December 31, 1999.

         Section 5. MISCELLANEOUS PROVISIONS. Except as otherwise expressly
provided by this Amendment, all of the terms, conditions and provisions of the
Credit Agreement and the other Loan Documents shall remain in full force and
effect. Each of the Companies confirms and agrees that the joint and several
Obligations of the Companies to the Bank, as amended and supplemented hereby,
are entitled to the benefits of the Loan Documents. The parties hereto hereby
acknowledge and agree that all references to the Credit Agreement and the
Obligations thereunder contained in any of the Loan Documents shall be
references to the Credit Agreement and the Obligations as amended hereby and as
the same may be amended, modified, supplemented, or restated from time to time.
This Amendment may be executed in any number of counterparts, but all such
counterparts shall together constitute but one instrument. In making proof of
this Amendment it shall not be necessary to produce or account for more than one
counterpart signed by each party hereto by and against which enforcement hereof
is sought. The Companies hereby jointly and severally confirm their obligations
to pay promptly upon request all reasonable out-of-pocket costs and expenses
incurred or sustained by the Bank in connection with this Amendment, including
the reasonable fees and expenses of Sullivan & Worcester LLP.

         Section 6. GOVERNING LAW. This Amendment shall be construed according
to and governed by the internal laws of The Commonwealth of Massachusetts
without reference to principles of conflicts of law.

                      [The remainder of this page has been
                           intentionally left blank.]

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         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed by their respective officers thereunto duly authorized.

                          SIGNAL TECHNOLOGY CORPORATION

                                         By:
                                            ------------------------------------
                                            Name:
                                            Title:

                                         SIGNAL TECHNOLOGY SALES CORP.

                                         By:
                                            ------------------------------------
                                            Name:
                                            Title:

                                         FLEET NATIONAL BANK

                                         By:
                                            ------------------------------------
                                            Name:
                                            Title:<PAGE>   1
                                                                   Exhibit 10.36

                   AMENDMENT AGREEMENT NO. 8 TO SECOND AMENDED
                          AND RESTATED CREDIT AGREEMENT

         This AMENDMENT AGREEMENT NO. 8 (this "Amendment"), dated as of May 11,
2000, by and among SIGNAL TECHNOLOGY CORPORATION, a Delaware corporation
("STC"), SIGNAL TECHNOLOGY SALES CORP., a United States Virgin Islands
corporation ("Sales" and, together with STC, the "Companies"), and FLEET
NATIONAL BANK, a national banking association formerly known as BankBoston, N.A
and as The First National Bank of Boston (the "Bank"), amends the Second Amended
and Restated Credit Agreement dated as of September 30, 1993, as amended (as the
same may be further amended, modified, or supplemented from time to time the
"Credit Agreement"), by and among the Companies and the Bank. Capitalized terms
used but not defined herein shall have the meanings set forth for such terms in
the Credit Agreement.

         WHEREAS, the Companies have requested that the Bank agree to amend the
Credit Agreement and grant a waiver thereunder; and

         WHEREAS, subject to the terms and provisions hereof, the Bank is
willing to do so;

         NOW, THEREFORE, the parties hereto hereby agree as follows:

Section 1. AMENDMENT TO CREDIT AGREEMENT. Subject to the satisfaction of the
conditions precedent set forth in Section 3 hereof, the Section 1 of the Credit
Agreement is hereby amended by amending the definition of the term "Revolving
Credit Maturity Date" set forth therein to read as follows:

                  "REVOLVING CREDIT MATURITY DATE - September 30, 2000."

         Section 2. REPRESENTATIONS AND WARRANTIES. The Companies hereby
represent and warrant to the Bank as follows:

                  (a) REPRESENTATIONS AND WARRANTIES IN CREDIT AGREEMENT. Except
         as specified in writing by the Companies to the Bank with respect to
         the subject matter of this Amendment prior to the execution and
         delivery hereof by the Bank and the Companies, the representations and
         warranties of the Companies contained in the Credit Agreement were true
         and correct in all material respects when made and continued to be true
         and correct in all material respects on the date hereof, except, in
         each case, to the extent of changes resulting from transactions
         contemplated or permitted by the Loan Documents and this Amendment,
         except for the Companies failure to be in compliance with Section 12.8
         of the Credit Agreement for the period of the four consecutive fiscal
         quarters ended March 31, 2000, changes occurring in the ordinary course
         of business which singly or in the aggregate are not materially
         adverse, and to the extent that such representations and warranties
         relate expressly to an earlier date.

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                  (b) AUTHORITY, NO CONFLICTS, ENFORCEABILITY OF OBLIGATIONS,
         ETC. Each of the Companies hereby confirms that the representations and
         warranties of the Companies contained in Sections 8.1 and 8.3 of the
         Credit Agreement are true and correct on and as of the date hereof as
         if made on the date hereof, treating this Amendment, the Credit
         Agreement as amended hereby, and the other Loan Documents as amended
         hereby, as "Loan Documents" for the purposes of making said
         representations and warranties.

         Section 3. CONDITIONS TO EFFECTIVENESS. The effectiveness of this
Amendment shall be subject to the delivery to the Bank by (or on behalf of) each
of the Companies, as the case may be, contemporaneously with the execution
hereof, of the following, in form and substance satisfactory to the Bank:

                  (a) this Amendment signed by each of the Companies and the
         Bank; and

                  (b) any other confirmatory or corporate authority document or
         instrument the Bank may reasonably request.

         Section 4. WAIVER OF NONCOMPLIANCE WITH COVENANTS. The Bank hereby
waives the Companies' noncompliance with Section 12.8 of the Credit Agreement
for the period of the four consecutive fiscal quarters ended March 31, 2000.

         Section 5. MISCELLANEOUS PROVISIONS. Except as otherwise expressly
provided by this Amendment, all of the terms, conditions and provisions of the
Credit Agreement and the other Loan Documents shall remain in full force and
effect. Each of the Companies confirms and agrees that the joint and several
Obligations of the Companies to the Bank, as amended and supplemented hereby,
are entitled to the benefits of the Loan Documents. The parties hereto hereby
acknowledge and agree that all references to the Credit Agreement and the
Obligations thereunder contained in any of the Loan Documents shall be
references to the Credit Agreement and the Obligations as amended hereby and as
the same may be amended, modified, supplemented, or restated from time to time.
This Amendment may be executed in any number of counterparts, but all such
counterparts shall together constitute but one instrument. In making proof of
this Amendment it shall not be necessary to produce or account for more than one
counterpart signed by each party hereto by and against which enforcement hereof
is sought. The Companies hereby jointly and severally confirm their obligations
to pay promptly upon request all reasonable out-of-pocket costs and expenses
incurred or sustained by the Bank in connection with this Amendment, including
the reasonable fees and expenses of Sullivan & Worcester LLP.

         Section 6. GOVERNING LAW. This Amendment shall be construed according
to and governed by the internal laws of The Commonwealth of Massachusetts
without reference to principles of conflicts of law.

                      [The remainder of this page has been
                           intentionally left blank.]

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         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed by their respective officers thereunto duly authorized.

                                     SIGNAL TECHNOLOGY CORPORATION

                                     By:
                                        -------------------------------
                                        Name:
                                        Title:

                                     SIGNAL TECHNOLOGY SALES CORP.

                                     By:
                                        -------------------------------
                                        Name:
                                        Title:

                                     FLEET NATIONAL BANK

                                     By:
                                        -------------------------------
                                        Name:
                                        Title:

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