CALIFORNIA AMPLIFIER INC
SC 13G, 1999-02-16
RADIO & TV BROADCASTING & COMMUNICATIONS EQUIPMENT
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934

                           CALIFORNIA AMPLIFIER, INC.
        -----------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
        -----------------------------------------------------------------
                         (Title of Class of Securities)

                                    129900106
                              --------------------
                                 (CUSIP Number)

                                  June 15, 1998
        ----------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

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 the section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).



<PAGE>


                                  SCHEDULE 13G
                               CUSIP NO. 129900106


1.    Names of Reporting Persons.
      I.R.S. Identification Nos. of above persons (entities only).

      Quaker Capital Management Corporation
      ------------------------------------------------------------------------

2.    Check the Appropriate Box if a Member of a Group 
      (a)
            -----
      (b)     X
            -----

3.    SEC Use Only
                        ------------------------------------------------------

4.    Citizenship or Place of Organization                       Pennsylvania
                                                               ---------------

Number of         5.    Sole Voting Power                              953,000
Shares                                                         ---------------
Beneficially      6.    Shared Voting Power                                  0
Owned by                                                       ---------------
Each Reporting    7.    Sole Dispositive Power                         953,000
Person With:                                                   ---------------
                  8.    Shared Dispositive Power                             0
                                                               ---------------

9.    Aggregate Amount Beneficially Owned by Each Reporting Person

                                                                       953,000
                                                                     ---------

10.   Check if the Aggregate Amount in Row (9) Excludes Certain
      Shares
                                                                      --------

      The Reporting Person disclaims beneficial ownership of 950,000 shares 
      owned by its clients.

11.   Percent of Class Represented by Amount in Row (9)                  8.09%
                                                                      --------

12.   Type of Reporting Person                                              IA
                                                                      --------


                               Page 2 of 6 Pages

<PAGE>

                                  SCHEDULE 13G
                               CUSIP NO. 129900106

Item 1.

      (a)   Name of Issuer

            California Amplifier, Inc.
            ----------------------------------------------------------

      (b)   Address of Issuer's Principal Executive Offices

            460 Calle San Pablo, Camarillo, CA 93012
            ----------------------------------------------------------
Item 2.

      (a)   Name of Persons Filing

            Quaker Capital Management Corporation
            ----------------------------------------------------------

      (b)   Address of Principal Business Office or, if none, Residence

            401 Wood Street, Suite 1300, Pittsburgh, PA  15222
            ----------------------------------------------------------

      (c)   Citizenship

            Pennsylvania, USA
            ----------------------------------------------------------

      (d)   Title of Class of Securities

            Common Stock
            ----------------------------------------------------------

      (e)   CUSIP Number

            129900106
            ----------------------------------------------------------


                               Page 3 of 6 Pages
<PAGE>

                                  SCHEDULE 13G
                               CUSIP NO. 129900106

Item 3.   If  this  statement  is  filed  pursuant  to   ss.ss.240.13d-1(b)   or
          240.13d-2(b) or (c), check whether the person filing is a:

   (a)  /   /   Broker of dealer registered under section 15 of the Act;

   (b)  /   /   Bank as defined in section 3(a)(6) of the Act;

   (c)  /   /   Insurance  company as defined in section  3(a)(19) of the Act;

   (d)  /   /   Investment  company  registered  under  section  8 of the
                Investment Company Act of 1940;

   (e)  / X /   An investment adviser in accordance with ss.240.13d-1(b)(l)
                (ii)(E);

   (f)  /   /   An employee  benefit plan or endowment  fund in accordance with 
                ss.240.13d-1(b)(1)(ii)(F);

   (g)  /   /   A parent  holding  company or control person in accordance with 
                ss.240.13d-1(b)(1)(ii)(G);

   (h)  /   /   A savings  association  as defined in Section  3(b) of the
                Federal Deposit Insurance Act;

   (i)  /   /   A church plan that is excluded  from the  definition of an
                investment  company under section  3(c)(14) of the  Investment
                Company Act of 1940;

   (j)  /   /   Group, in accordance with ss.240.13d-1((b)(l)(ii)(J)

Item 4.   Ownership.

     Provide  the  following  information  regarding  the  aggregate  number and
percentage of the class of securities of the issuer identified in Item 1.

      (a)   Amount beneficially owned:                                 953,000
                                                               ---------------

      (b)   Percent of class:                                            8.09%
                                                               ---------------


                               Page 4 of 6 Pages
<PAGE>

                                  SCHEDULE 13G
                               CUSIP NO. 129900106

      (c)   Number of shares as to which the person has:

            (i)   Sole power to vote or to direct the
                  vote                                                 953,000
                                                                    ----------

            (ii)  Shared power to vote or to direct
                  the vote                                                   0
                                                                    ----------

            (iii) Sole power to dispose or to direct
                  the vote                                             953,000
                                                                    ----------

            (iv)  Shared power to dispose or to direct
                  the disposition of                                         0
                                                                    ----------

Item 5.   Ownership of Five Percent or Less of a Class

     If this  statement  is being  filed to report  the fact that as of the date
hereof,  the reporting person has ceased to be the beneficial owner of more than
five percent of the class of securities, check the following: 
                                                                    ----------

Item 6.   Ownership of More than Five Percent on Behalf of Another Person

     950,000 of the shares with  respect to which this report is filed are owned
by a variety of  investment  advisory  clients of the  Reporting  Person,  which
clients are entitled to receive  dividends on and the proceeds  from the sale of
such shares. No client is known to own more than 5% of the class.

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.


                               Page 5 of 6 Pages
<PAGE>

                                  SCHEDULE 13G
                               CUSIP NO. 129900106

Item 10.  Certification

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

                               QUAKER CAPITAL MANAGEMENT CORPORATION


                                      FEBRUARY 14, 1999
                                      --------------------------------        
                                                   Date



                                      /s/ Mark G. Schoeppner
                                      --------------------------------
                                                 Signature


                                      Mark G. Schoeppner, President
                                      -------------------------------- 
                                                 Name/Title





                               Page 6 of 6 Pages


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