Washington, D.C. 20549

                                 SCHEDULE 13D/A
                    Under the Securities Exchange Act of 1934
                               (Amendment No. 1) *

                            Merrimac Industries, Inc.
                                (Name of Issuer)

                     Common Stock, par value $.01 per share
                         (Title of Class of Securities)

                                   590262 10 1
                                 (CUSIP Number)

                             Richard H. Gilden, Esq.
                       Kramer Levin Naftalis & Frankel LLP
                                919 Third Avenue
                            New York, New York 10022
                                 (212) 715-9100
           (Name, Address and Telephone Number of Person Authorized to
                       Receive Notices and Communications)

                                 August 18, 2004
             (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition that is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following
box. |_|

Note: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Rule 13d-7 for other parties
to whom copies are to be sent.

* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the

                                Page 1 of 7 pages

                                  SCHEDULE 13D

CUSIP NO. 590262 10 1
  1.   Names of Reporting Persons.
       I.R.S. Identification Nos. of above persons (entities only)
       Lior Bregman
  2.   Check the Appropriate Box if a Member of a Group (See Instructions)
                                                            (a)  [ ]
                                                            (b)  [ ]
  3.   SEC Use only

  4.   Source of funds (See PF Instructions)

  5.   Check if disclosure of Legal Proceedings Is Required
       Pursuant to Items 2(d) or 2(e)
  6.   Citizenship or Place of Organization
       United States
Number of                     7.  Sole Voting Power
Shares                            175,000
Beneficially              ------------------------------------------------------
Owned by                      8.  Shared Voting Power
Each                              0
Reporting                 ------------------------------------------------------
Person                        9.  Sole Dispositive Power
With                              175,000
                             10.  Shared Dispositive Power
 11.   Aggregate Amount Beneficially Owned by Each Reporting Person
 12.   Check if the Aggregate Amount in Row (11) Excludes Certain Shares
       (See Instructions)
 13.   Percent of Class Represented by Amount in Row (11)
 14.   Type of Reporting Person (See Instructions)

                                Page 2 of 7 pages

The following constitutes Amendment No. 1 ("Amendment No. 1") to the Schedule
13D originally filed by Lior Bregman ("Mr. Bregman") with the Securities and
Exchange Commission (the "SEC") on November 19, 2003. This Amendment No. 1
amends the Schedule 13D as specifically set forth herein.

Item 4.     Purpose of Transaction

            Item 4 is hereby amended and restated to read as follows:

            Mr. Bregman has purchased the shares of common stock, par value $.01
per share (the "Common Stock") of Merrimac Industries, Inc. (the "Issuer") for
investment purposes. Mr. Bregman has extensive experience and relationships in
the defense and wireless telecommunications industries and has intended to work
with the management of the Issuer to maximize stockholder value.

            On August 18, 2004, Mr. Bregman delivered a letter to Mason N.
Carter, Chairman of the Board, President and Chief Executive Officer of the
Issuer, a copy of which is attached as an exhibit hereto and incorporated herein
by reference (the "Letter"), expressing Mr. Bregman's disappointment with the
Issuer's management and board of directors failure to act in the best interests
of the Issuer's stockholders or to allow Mr. Bregman to use his experience and
industry contacts to assist the Issuer either via a Board membership or a
consulting agreement. Mr. Bregman has proposed that the Board immediately
appoint a special committee of disinterested directors to engage a qualified
investment banker to evaluate the Company's strategic alternatives and seek to
effect a transaction that will maximize shareholder value. Mr. Bregman will
consider, among other matters, forming a group to seek to acquire control of the
Company and/or to nominate himself for election to the Issuer's board of
directors at the next annual meeting of stockholders of the Issuer.

            Mr. Bregman does not have any present plans or proposals which
relate to or would result in any of the actions described in subsections (a)
through (j) of Item 4 of Schedule 13D, except as set forth herein. Depending on
various factors, including, without limitation, the Issuer's financial position
and investment strategy, the price levels of the Common Stock, conditions in the
securities markets and general economic and industry conditions, Mr. Bregman may
in the future take such actions with respect to his investment in the Issuer he
deems appropriate, including, without limitation, purchasing additional shares
of Common Stock, selling some of all of his shares of Common Stock or changing
his intention with respect to any and all matters referred to in Item 4.

Item 5.     Interest in Securities of the Issuer

            Paragraphs (a), (b) and (c) of Item 5 are hereby amended as follows:

            (a) and (b) As of August 19, 2004, Mr. Bregman beneficially owns
175,000 shares of Common Stock. Mr. Bregman has the sole power to vote and
dispose of all such shares. Such shares constitute approximately 5.59% of the
total number of shares of Common Stock outstanding. The percentage of the
outstanding Common Stock set forth above is based on 3,130,944 shares of Common
Stock reported as outstanding as of August 13, 2004 by the Issuer on its Form
10-QSB for the quarter ended June 30, 2004, filed with the SEC on August 17,

            (c) The following table sets forth the purchase of Common Stock of
the Issuer (totaling 7,500 shares) made by Mr. Bregman from June 19, 2004
through August 19, 2004. All such sales were made in open market transactions on
the American Stock Exchange:

                                Page 3 of 7 pages

                     Number of       Average
   Date of            Shares        Price Per
 Transaction        Purchased         Share
08/16/04               300           $6.79
08/13/04             3,000           $6.75
08/12/04             1,200           $6.70
08/10/04             3,000           $6.60

Item 7.     Material to be filed as Exhibits

            Item 7 is hereby amended and restated to read as follows:

            Exhibit No.     Description
            -----------     -----------

            1               Letter from Lior Bregman to Mason N. Carter, dated
                            August 18, 2004.

                                Page 4 of 7 pages


      After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and

                                                Date: August 19, 2004

                                                /s/ Lior Bregman
                                                Lior Bregman

                                Page 5 of 7 pages

                                                                       EXHIBIT 1

                                  LIOR BREGMAN

                               10 Sinclair Terrace
                          Short Hills, New Jersey 07078

                                                           August 18, 2004


Mr. Mason N. Carter
Chairman of the Board, President and
  Chief Executive Officer
Merrimac Industries, Inc.
41 Fairfield Place
West Caldwell, New Jersey 07006

Dear Mr. Carter:

      As you know, I am the beneficial owner of over 5% of the stock of Merrimac
Industries, Inc. (the "Company"). Despite my efforts to increase my involvement
with the Company, I have been disappointed by the failure of the Company's
management and its board of directors (the "Board") to act in the best interests
of the Company's stockholders and to allow me to use my experience and industry
contacts to assist the Company.

      In a constructive effort to assist the Company's management, I arranged
for, and accompanied the Company's management on a business development trip to
Israel to meet with potential customers. I believe the trip was very successful
and created good will and real revenue potential. However, since our return, the
Company has done virtually nothing to keep me informed about progress made nor
did it attempt to take advantage of my offer to arrange similar meetings with
U.S-based potential customers.

      I have specifically offered to assist the Company by becoming a member of
its Board, a well-justified proposal in view of my significant holding and
relevant background from financial and business development perspectives. If
this was not acceptable for some reason, I was willing to act as a consultant to
the Company (with whatever reasonable compensation might be agreed upon between
us). I have coupled these offers with a willingness to enter into a standstill
agreement in order to assure the Company that my intentions were clearly to be a
positive force. I have offered to purchase additional shares from the company or
enter a relationship that involves the award of warrants. I have agreed to enter
into an agreement to hold any material non-public information in confidence in
order to assure the Company that it would not run afoul of SEC restrictions. All
of these offers have been rebuffed.

      I am hard pressed to understand why the Company's Board has not pursued
these avenues further. While the Company's financial performance has improved
considerably in recent quarters, I believe its stock remains dramatically
undervalued in the financial marketplace. Every effort I have made to formalize
my relationship with the Company has failed to be answered in a constructive

                                Page 6 of 7 pages

      I propose that the Board immediately appoint a special committee of
disinterested directors to engage a qualified investment banker to evaluate the
Company's strategic alternatives and seek to effect a transaction that will
maximize shareholder value. If ignored again, I will be forced to take steps
aimed at shifting control of the Company to stewards who will be open to broader
horizons than those targeted by the Company's current management and Board. I
have had preliminary discussions with several investment banks and strategic
partners and will consider forming a group to seek to acquire control of the
Company. I am also considering soliciting proxies from the Company's
stockholders for my election to the Board. I feel that these are steps that I
will be forced to undertake to ensure a fair return on the investments made by
the Company's stockholders.

      I hope that you will take this letter as a call to action rather than as a
threat. My intention remains to work with Company if it is seeking the future
that I believe is available to it. However, if my pleas continue to fall on deaf
ears, I will be forced to act to compel a change.

      I have recently acquired additional shares of the Company and will be
amending my Schedule 13D to reflect these purchases, as well as my intentions,
as expressed in this letter. Please address any correspondence to me at 10
Sinclair Terrace, Short Hills, New Jersey 07079, telephone (973) 467-5021,
facsimile (973) 467-9223, with a copy to my counsel, Kramer Levin Naftalis &
Frankel LLP, 919 Third Avenue, New York, New York 10022, Attention: Richard H.
Gilden, telephone (212) 715-9486, facsimile (212) 715-8085.

      I look forward to your prompt response.

                                    Best regards,

                                    /s/ Lior Bregman
                                    Lior Bregman

cc:   Robert C. Cargo
      Fernando L. Fernandez
      Joel H. Goldberg
      Edward H. Cohen
      Arthur A. Oliner
      Harold J. Raveche
      Albert H. Cohen
      David B. Miller

                                Page 7 of 7 pages