EXHIBIT 10.7
                                THIRD AMENDMENT
                                       TO
                     AMENDED AND RESTATED CREDIT AGREEMENT


                  THIRD   AMENDMENT,   dated  as  of   November   6,  1995  (the
'Amendment'),  to the Amended and Restated Credit  Agreement,  dated as of April
12, 1995, among NAI Technologies, Inc., a New York corporation (the 'Borrower'),
Chemical  Bank, a New York  banking  corporation  ('Chemical'),  The Bank of New
York, a New York banking  corporation  ('BNY'),  and each of the other financial
institutions  which  from time to time  becomes  party  thereto  (together  with
Chemical and BNY, the 'Banks'),  BNY, as administrative agent (in such capacity,
the  'Administrative  Agent'),  and  Chemical,  as  collateral  agent  (in  such
capacity, the 'Collateral Agent').

                             W I T N E S S E T H :

                  WHEREAS, the Borrower, the Banks, the Administrative Agent and
the  Collateral  Agent are parties to that certain  Amended and Restated  Credit
Agreement,  dated as of  April  12,  1995  (as  amended  by that  certain  First
Amendment, dated as of August 14, 1995, and that certain Second Amendment, dated
as of October 13, 1995, the 'Credit Agreement');

                  WHEREAS, unless otherwise defined herein, terms defined in the
Credit Agreement and used herein are used herein as therein defined;

                  WHEREAS,  in  connection  with the  Borrower's  incurrence  of
Subordinated Indebtedness,  the Borrower has executed a promissory note in favor
of Charles Holmes in the principal amount of $1,000,000, which note provides for
certain  covenants and defaults  which differ from those set forth in the Credit
Agreement;

                  WHEREAS,  by letter dated  October 13, 1995,  the Borrower has
agreed to amend the Credit Agreement as hereinafter provided; and

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

                  Section 1.  Amendments  to Article V.  Article V of the Credit
Agreement is hereby amended by (a) amending  Section 5.01(f) to add the words ',
registration  statements,' after the words 'proxy statements' and (b) adding the
following section to the end of such Article:

                           Section 5.18.  Maintenance  of  Properties.  Keep all
                  properties  useful in the  business  of the  Borrower  in good
                  working  order  and  condition   except  to  the  extent  that
                  discontinuing   the  operation  or  maintenance  of  any  such
                  properties  is, in the judgment of the Borrower,  desirable in
                  the conduct of its business.








                  Section 2.  Amendments to Article VI. Article VI of the Credit
Agreement  is hereby  amended by (a)  amending  Section  6.07 in its entirety as
follows:

                           Section 6.07. Transactions with Affiliates.  Directly
                  or indirectly enter into or permit to exist any transaction or
                  series of related transactions (including, but not limited to,
                  the purchase,  sale or exchange of property, the making of any
                  investment,  the giving of any  guarantee or the  rendering of
                  any service)  with any  Affiliate  of the Borrower  unless (i)
                  such transaction or series of related transactions is on terms
                  no less  favorable  to the  Borrower or such  Subsidiary  than
                  those that could be  obtained  in a  comparable  arm's  length
                  transaction  with a Person that is not an Affiliate,  and (ii)
                  such transaction or series of related transactions is approved
                  by a  majority  of the  Board  of  Directors  of the  Borrower
                  (including a majority of the disinterested  directors),  which
                  approval is set forth in a board  resolution  of the  Borrower
                  certifying  that such  transaction  or series of  transactions
                  complies with the immediately preceding clause (i).

and (b)  amending  Section 6.08 thereof to delete both clauses (a) and (b) after
the words 'except for' and to substitute the words 'Permitted Investments'.

                  Section 3.  Amendments  to  Article  VII.  Article  VII of the
Credit  Agreement is hereby amended by (a) amending  Section  7.01(f)(ii)(y)  to
substitute  '30  days'  for '60  days';  (b)  amending  Section  7.01(j)(ii)  to
substitute '30 consecutive days' for '45 consecutive  days'; (c) moving the word
'or'  from the end of  Section  7.01(o)  to the end of Section 7.01(p);  and (d)
adding the following subsection to the end of Section 7.01(p):

                           (q)      all or any substantial part of the assets
                  or property of the Borrower are condemned, seized
                  or appropriated by any Governmental Authority;

                  Section 4. Representations and Warranties. The representations
and  warranties  set forth in  Section 3 of the  Credit  Agreement  are true and
correct in all  material  respects on and as of the date  hereof,  except to the
extent that such  representations and warranties  expressly relate to an earlier
date. As of the Effective Date (as hereinafter defined), and after giving effect
to this  Amendment,  no Event of  Default,  or an event which with the giving of
notice or the passage of time,  or both,  would  constitute an Event of Default,
exists.

                  Section 5.  Conditions to Effectiveness.  This Amendment
shall become effective as of the date hereof (the 'Effective Date')

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when the Banks shall have each received  counterparts  of this  Amendment,  duly
executed by the Borrower.

                  Section 6. Ratification.  Except to the extent hereby amended,
the Credit Agreement remains in full force and effect and is hereby ratified and
affirmed.  References in the Loan Documents to the Credit  Agreement  shall mean
such document as amended by this Amendment,  as the same may be further amended,
supplemented or otherwise modified from time to time.

                  Section  7. Costs and  Expenses.  All  out-of-pocket  expenses
incurred  by the Banks,  including  the  reasonable  fees and  disbursements  of
Zalkin,  Rodin & Goodman LLP, counsel to the Banks,  incurred in connection with
the  negotiation and preparation of this Amendment shall be paid by the Borrower
as  provided  in  Section  9.05 of the Credit  Agreement.  The  Borrower  hereby
confirms that the Borrower shall be obligated to reimburse the Banks' reasonable
expenses  incurred  in the  retention  of a  financial  advisor  to the Banks in
connection with the administration of the Loans or the protection or enforcement
of the Banks' rights in connection therewith.

                  Section  8.  References.   This  Amendment  shall  be  limited
precisely  as  written  and  shall not be  deemed  (a) to be a  consent  granted
pursuant to, or a waiver or modification  of, any other term or condition of the
Credit Agreement or any of the instruments or agreements  referred to therein or
(b) to prejudice any right or rights which the Administrative Agent,  Collateral
Agent or the Banks  may now have or have in the  future  under or in  connection
with the Credit  Agreement or the Loan  Documents or any of the  instruments  or
agreements referred to therein.

                  Section  9.  Applicable  Law.  THIS  AMENDMENT  SHALL  IN  ALL
RESPECTS BE CONSTRUED IN  ACCORDANCE  WITH AND GOVERNED BY THE LAWS OF THE STATE
OF NEW YORK APPLICABLE TO CONTRACTS MADE AND TO BE PERFORMED  WHOLLY WITHIN SUCH
STATE.

                  Section 10.  Headings.  Section headings in this Amendment are
included  herein  for  convenience  of  reference only and are not to affect the
construction of, or to be taken into consideration in interpreting, this
Amendment.

                  Section 11. Integration.  This Amendment represents the entire
agreement  of the parties  hereto with  respect to the  amendment  of the Credit
Agreement,  and the terms of any letters and other  documentation  entered  into
among the Borrower and any Bank or the  Administrative  Agent or the  Collateral
Agent prior to the execution of this Amendment  which relate to the amendment of
the Credit Agreement shall be replaced by the terms of this Amendment.

                  Section 12. Execution in  Counterparts.  This Amendment may be
executed  in any  number of  counterparts,  each of which  shall  constitute  an
original,  but all of which taken  together  shall  constitute  one and the same
instrument.

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                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Amendment  to be duly  executed  and  delivered  in New York,  New York by their
proper and duly authorized officers as of the day and year first above written.

                                         NAI TECHNOLOGIES, INC.

                                         By___________________________
                                           Title:


                                         THE BANK OF NEW YORK
                                         as Administrative Agent and as a Bank

                                         By:___________________________
                                            Vice President

                                         CHEMICAL BANK
                                         as Collateral Agent and as a Bank

                                         By:___________________________
                                            Vice President
Consented to as of this
____ day of November, 1995

NAI TECHNOLOGIES - SYSTEMS DIVISION CORPORATION

By:_______________________
   Title:

WILCOM, INC.

By:_______________________
   Title:

ARATHON, V.I., INC.

By:_______________________
   Title:

CODAR TECHNOLOGY, INC.

By:_______________________
   Title:

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