EXHIBIT 4.15

                            CERTIFICATE OF AMENDMENT
                                       OF
                           CERTIFICATE OF DESIGNATION
                                       OF
         SERIES A 12% CUMULATIVE CONVERTIBLE REDEEMABLE PREFERRED STOCK
                              OF LOGIMETRICS, INC.

          LogiMetrics,  Inc., a  corporation  organized  and existing  under the
General  Corporation  Law of the State of  Delaware  (the  "Corporation"),  does
hereby certify that:

          The following amendments to the Certificate of Designation of Series A
12% Cumulative Convertible Redeemable Preferred Stock ("Preferred Stock") of the
Corporation  ("Certificate of Designation") were duly adopted in accordance with
the  provisions  of Section 242 of the General  Corporation  Law of the State of
Delaware:

          1. Section 2 of the  Certificate  of  Designation is hereby amended to
read in its entirety as follows:

          "2.  Dividends.  The  holders of shares of  Preferred  Stock  shall be
entitled  to receive,  but only when and as declared by the Board of  Directors,
dividends  in an amount  equal to twelve  percent  (12%) of the Stated Value per
share per annum,  payable quarterly on such dates in each year as shall be fixed
by the Board of Directors. Such dividends shall be payable, at the option of the
Board of  Directors,  either in cash or in shares of Common Stock having a "Fair
Market Value" (as defined  below) on the date of  declaration  equal to the cash
dividend otherwise payable.  As used herein,  "Fair Market Value" on any date of
determination  means the  average of the last sale price per share of the Common
Stock for ten trading days  immediately  preceding  such date as reported by any
national  securities  exchange  on which  the  Common  Stock is then  listed  or
admitted  for trading or as reported  by the Nasdaq  Stock  Market if the Common
Stock is not then listed or  admitted  for  trading on any  national  securities
exchange,  or the average of the  closing bid and asked  prices per share of the
Common  Stock  for the ten  trading  days  immediately  preceding  such  date as
reported  on the OTC  Bulletin  Board  or any  similar  successor  service  then
publishing quotations on the Common Stock if the Common Stock is not then listed
or admitted for trading on any national  securities  exchange or included on the
Nasdaq Stock Market,  or as  determined in good faith by the Company's  Board of
Directors  in the event that the Common Stock is not then listed or admitted for
trading on any  national  securities  exchange or  included on the Nasdaq  Stock
Market  and  quotations  on the  Common  Stock  are  not  then  being  regularly
published."

          2. Section 8 of the  Certificate  of  Designation is hereby amended to
read in its entirety as follows:

          "8. Voting rights of preferred.  Except as expressly  provided by law,
the  Preferred  Stock  shall  have no  right to vote on any  question  or in any
proceeding or to be  represented  at or to receive  notice of any meeting of the
stockholders."

          IN WITNESS WHEREOF,  the Corporation has caused this certificate to be
executed  and  attested  by its  duly  authorized  officers,  this  30th  day of
November, 1999.

                                             LOGIMETRICS, INC.



                                              By:______________________________
                                                 Norman M. Phipps, President and
                                                 Chief Operating Officer

ATTEST:


__________________________
Erik S. Kruger, Secretary