SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549



                                  SCHEDULE 13G/A
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                                (AMENDMENT NO. 7)


                                  BEL FUSE INC.
             ------------------------------------------------------
                                (NAME OF ISSUER)


                 CLASS B COMMON STOCK,  $.10 PAR VALUE PER SHARE
             ------------------------------------------------------
                         (TITLE OF CLASS OF SECURITIES)


                                    077347300
             ------------------------------------------------------
                                 (CUSIP NUMBER)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[X]  Rule 13d-1(b)

[ ]  Rule 13d-1(c)

[ ]  Rule 13d-1(d)

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 the
disclosures provided in a prior cover page.

The information required in 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
notes).




- - --------------------------------------------------------------
  1   NAME OF REPORTING PERSONS
      S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

      EQSF ADVISERS, INC.

      (EIN 13-3354359)

- - --------------------------------------------------------------
- - --------------------------------------------------------------
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
       (a)  [  ]
       (b)  [  ]
- - --------------------------------------------------------------
- - --------------------------------------------------------------
  3   SEC USE ONLY

- - --------------------------------------------------------------
- - --------------------------------------------------------------
  4   CITIZENSHIP OR PLACE OF ORGANIZATION

                   NEW YORK CORPORATION

- - --------------------------------------------------------------
- - --------------------------------------------------------------
                   5 SOLE VOTING POWER

                           424,400
   NUMBER OF     ---------------------------------------------
                 ---------------------------------------------
     SHARES        6  SHARED VOTING POWER
  BENEFICIALLY
    OWNED BY               NONE
                 ---------------------------------------------
                 ---------------------------------------------
      EACH         7  SOLE DISPOSITIVE POWER
   REPORTING
     PERSON                550,400

                 ---------------------------------------------
                 ---------------------------------------------
      WITH        8   SHARED DISPOSITIVE POWER

                           NONE
- - --------------------------------------------------------------
- - --------------------------------------------------------------
 9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
      PERSON

           550,400
- - --------------------------------------------------------------
- - --------------------------------------------------------------
 10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
      CERTAIN SHARES*
             [    ]

- - --------------------------------------------------------------
- - --------------------------------------------------------------
 11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

           6.81%
- - --------------------------------------------------------------
- - --------------------------------------------------------------
 12   TYPE OF REPORTING PERSON*

           IA
- - --------------------------------------------------------------




- - --------------------------------------------------------------
  1   NAME OF REPORTING PERSONS
      S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

      M.J. WHITMAN ADVISERS, INC.

      (EIN 13-3686379)

- - --------------------------------------------------------------
- - --------------------------------------------------------------
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
       (a)  [  ]
       (b)  [  ]
- - --------------------------------------------------------------
- - --------------------------------------------------------------
  3   SEC USE ONLY

- - --------------------------------------------------------------
- - --------------------------------------------------------------
  4   CITIZENSHIP OR PLACE OF ORGANIZATION

                              NEW YORK CORPORATION

- - --------------------------------------------------------------
- - --------------------------------------------------------------
                  5 SOLE VOTING POWER

                              186,150
   NUMBER OF     ---------------------------------------------
                 ---------------------------------------------
     SHARES        6  SHARED VOTING POWER
  BENEFICIALLY
    OWNED BY                  NONE
                 ---------------------------------------------
                 ---------------------------------------------
      EACH         7  SOLE DISPOSITIVE POWER
   REPORTING
     PERSON                   198,925
                 ---------------------------------------------
                 ---------------------------------------------
      WITH        8   SHARED DISPOSITIVE POWER

                              NONE
- - --------------------------------------------------------------
- - --------------------------------------------------------------
 9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
      PERSON

         198,925
- - --------------------------------------------------------------
- - --------------------------------------------------------------
 10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
      CERTAIN SHARES*
             [    ]

- - --------------------------------------------------------------
- - --------------------------------------------------------------
 11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

         2.46%
- - --------------------------------------------------------------
- - --------------------------------------------------------------
 12   TYPE OF REPORTING PERSON*

         IA
- - --------------------------------------------------------------




- - --------------------------------------------------------------
  1   NAME OF REPORTING PERSONS
      S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

           MARTIN J. WHITMAN

- - --------------------------------------------------------------
- - --------------------------------------------------------------
  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
        (a)  [  ]
        (b)  [  ]
- - --------------------------------------------------------------
- - --------------------------------------------------------------
  3   SEC USE ONLY

- - --------------------------------------------------------------
- - --------------------------------------------------------------
  4   CITIZENSHIP OR PLACE OF ORGANIZATION

           USA
- - --------------------------------------------------------------
- - --------------------------------------------------------------
                   5 SOLE VOTING POWER

   NUMBER OF               NONE  (SEE ITEM 4)
                 ---------------------------------------------
                 ---------------------------------------------
                   6 SHARED VOTING POWER
     SHARES
                           NONE
  BENEFICIALLY
    OWNED BY
                 ---------------------------------------------
                 ---------------------------------------------
      EACH         7  SOLE DISPOSITIVE POWER

   REPORTING               NONE  (SEE ITEM 4)
                 ---------------------------------------------
                 ---------------------------------------------
  PERSON WITH     8   SHARED DISPOSITIVE POWER

                           NONE
- - --------------------------------------------------------------
- - --------------------------------------------------------------
 9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
      PERSON

           -0-    (SEE ITEM 4)
- - --------------------------------------------------------------
- - --------------------------------------------------------------
 10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
      CERTAIN SHARES*
             [  ]

- - --------------------------------------------------------------
- - --------------------------------------------------------------
 11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

           -0-
- - --------------------------------------------------------------
- - --------------------------------------------------------------
 12   TYPE OF REPORTING PERSON*

           IN
- - --------------------------------------------------------------



ITEM 1.

     (A) NAME OF ISSUER:

         Bel Fuse (the "Issuer").

     (B) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES OR,IF NONE, RESIDENCE:

         206 Van Vorst Street, Jersey City, NJ 07302

ITEM 2.

     (A) NAME OF PERSON FILING:

         This  schedule  is  being  jointly  filed  by EQSF
Advisers,   Inc.  ("EQSF"),  M.J.  Whitman  Advisers,  Inc.
("MJWA")  and  Martin  J.  Whitman,   the  Chief  Executive
Officer  of EQSF and MJWA and  controlling  person  of EQSF
and MJWA.  (EQSF,  MJWA and Martin J. Whitman are sometimes
collectively   referred   to   hereinafter   as   "Filer").
Attached  hereto  as an  exhibit  is a copy  of  the  joint
Schedule 13G filing agreement among the reporting persons.

     (B) ADDRESS OF PRINCIPAL BUSINESS OFFICE:

         The address of the principal  executive  office of
EQSF,  MJWA and Mr.  Whitman  is:  767  Third  Avenue,  New
York, New York 10017-2023.

     (C) CITIZENSHIP:

         The  citizenship  or place  of  organization  of each of the  reporting
persons is as follows:

         EQSF

         New York State Corporation.

         MJWA

         New York State Corporation.

         MARTIN J. WHITMAN

         United States Citizen.

     (D) TITLE OF CLASS OF SECURITIES:

         Common Stock, $.10 par value per share.

     (E) CUSIP NUMBER:

         077347300

ITEM 3. IF THIS  STATEMENT  IS  BEING  FILED  PURSUANT  TO  RULES  13D-1(B),  OR
13D-2(B), CHECK WHETHER THE PERSON FILING IS A:

         (E) Investment  Adviser  registered under section 203 OF THE INVESTMENT
ADVISERS ACT OF 1940 (EQSF and MJWA).

ITEM 4.  OWNERSHIP.

         (a) & (b) EQSF  beneficially owns 550,400 shares, or 6.81% of the class
of securities of the issuer.  MJWA beneficially owns 198,925 shares, or 2.46% of
the class of securities of the issuer.

         (c)    (i) EQSF: 424,400
                    MJWA: 186,150

               (ii) Not applicable.

              (iii) EQSF: 550,400
                    MJWA: 198,925

               (iv) Not applicable.

     Mr.  Whitman  disclaims  beneficial  ownership  of all
such shares.

ITEM 5.  OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.

         Not applicable.


ITEM 6.  OWNERSHIP  OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

     Third  Avenue  Small-Cap Value  Fund,  an  investment  company  registered
under the Investment Company Act of 1940, has the right to receive dividends
from, and the proceeds from the sale of 228,900 of the shares reported by EQSF,
Sun America Small Cap Style Select Fund, an investment company registered under
the Investment Company Act of 1940, has the right to receive  dividends  from,
and the proceeds from the sale of 8,600 of the shares reported by EQSF, Third
Avenue Value Portfolio of the WRL Series Fund, an investment company registered
under the Investment Company Act of 1940, has the right to receive dividends
from, and the proceeds from the sale of 39,400 of the shares reported by EQSF,
American Express Partners Small Cap Value Fund,  an investment  company
registered under the Investment Company Act of 1940, has the right to receive
dividends from, and the proceeds from the sale of 112,500 of the shares reported
by EQSF, Third Avenue Variable Portfolio of the Third Avenue Variable Series
Trust an investment company  registered  under the Investment  Company Act of
1940, has the right to receive  dividends from, and the proceeds from the sale
of 142,500 of the shares reported by EQSF, American Express Partners Variable
Annuity Fund, an investment company registered  under the Investment  Company
Act of 1940, has the right to receive dividends from, and the proceeds from the
sale of 13,500 of the shares reported by EQSF, and Integrity Life/Legends
Third Avenue Value Fund, an Investment company registered under the Investment
Company Act of 1940, has the right to receive dividends from, and the proceeds
from the sale of 5,000 of the shares reported by EQSF. Various clients for
whom MJWA acts as investment advisor have the right to receive dividends from,
and the proceeds of the sale of, the shares reported by MJWA.

ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE
        SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.

         Not Applicable.

ITEM 8.  IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.

         Not applicable.

ITEM 9.  NOTICE OF DISSOLUTION OF GROUP.

         Not applicable.

ITEM 10. CERTIFICATION.

         By  signing  below I  certify  that,  to the best of my  knowledge  and
belief, the securities referred to above were acquired in the ordinary course of
business  and were not acquired for the purpose of and do not have the effect of
changing or  influencing  the control of the issuer of such  securities and were
not acquired in connection  with or as a participant in any  transaction  having
such purposes or effect.




                                    SIGNATURE

         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
correct.

                              January 14, 2002
                           ---------------------------
                              (Date)




                           EQSF ADVISERS, INC.

                           BY:/S/ MARTIN J. WHITMAN
                              ------------------------
                              Martin J. Whitman
                              Chairman and Chief Executive Officer


                           M.J. WHITMAN ADVISERS, INC.

                           BY:/S/  MARTIN J. WHITMAN
                              ----------------------
                              Martin J. Whitman
                              Chairman and Chief Investment Officer



                              /S/  MARTIN J. WHITMAN
                              -----------------------
                              Martin J. Whitman, President








          Exhibit 1



                             JOINT FILING AGREEMENT

     In  accordance  with Rule 13d-1 (f) under the  Securities  Exchange  Act of
1934,  as amended,  the  undersigned  hereby  agree to the joint filing with all
other Reporting Entities (as such term is defined in the Schedule 13G) on behalf
of each of them of a statement on Schedule 13G  (including  amendments  thereto)
with respect to the Class B Common Stock,  $.10 par value per share, of Bel Fuse
Inc., and that this  Agreement be included as an Exhibit to such joint  filing.
This Agreement may be executed in any number of counterparts all of which taken
together shall constitute one and the same instrument.

     IN WITNESS WHEREOF, the undersigned hereby execute this Agreement this
14th day of January, 2002.

                                          EQSF ADVISERS, INC.

                                          By:/s/ MARTIN J. WHITMAN
                                          --------------------------
                                          Martin J. Whitman
                                          Chairman and Chief Executive Officer


                                          M.J. WHITMAN ADVISERS, INC.

                                          By:/s/ MARTIN J. WHITMAN
                                          --------------------------
                                          Martin J. Whitman
                                          Chairman and Chief Investment Officer

                                          /s/   MARTIN J. WHITMAN
                                          --------------------------
                                           Martin J. Whitman