SCHEDULE 13G
                               CUSIP NO. 71376K102


                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                               (Amendment No.__)*


                         PERFORMANCE TECHNOLOGIES, INC.
        ----------------------------------------------------------------
                                (Name of Issuer)

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

                                    71376K102
                              --------------------
                                 (CUSIP Number)

                               December 19, 2007
        ----------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

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

         /   /    Rule 13d-1(b)
         / X /    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).





                                  SCHEDULE 13G
                              CUSIP NO. 71376K102


1) NAME OF REPORTING PERSON

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

         S.S. OR I.R.S. IDENTIFICATION
         NO. OF ABOVE PERSON                            25-1495646
                                                        -----------

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

4)       CITIZENSHIP OR PLACE OF ORGANIZATION           Commonwealth of
                                                        Pennsylvania
                                                        ---------------
NUMBER OF SHARES BENEFICIALLY OWNED BY
EACH REPORTING PERSON WITH:

         5)       SOLE VOTING POWER                     1,180,700
                                                        ---------

         6)       SHARED VOTING POWER                   0
                                                        ---------

         7)       SOLE DISPOSITIVE POWER                1,180,700
                                                        ---------

         8)       SHARED DISPOSITIVE POWER              0
                                                        ---------

9)   AGGREGATE AMOUNT BENEFICIALLY OWNED
     BY EACH REPORTING PERSON                           1,180,700
                                                        ---------

10)  CHECK IF THE AGGREGATE AMOUNT IN ROW (9)
     EXCLUDES CERTAIN SHARES                      [ ]


11)  PERCENT OF CLASS REPRESENTED BY
     AMOUNT IN ROW (9)                                  10.01%
                                                        ---------

12)  TYPE OF REPORTING PERSON                           IA
                                                        ---------

                               Page 2 of 15 Pages




                                  SCHEDULE 13G
                               CUSIP NO. 71376K102

1) NAME OF REPORTING PERSON

Quaker Capital Partners I, L.P.
-------------------------------------

         S.S. OR I.R.S. IDENTIFICATION
         NO. OF ABOVE PERSON                            25-1778076
                                                        ----------

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

4) CITIZENSHIP OR PLACE OF ORGANIZATION                 Delaware
                                                        ----------
NUMBER OF SHARES BENEFICIALLY OWNED BY
EACH REPORTING PERSON WITH:

         5)       SOLE VOTING POWER                     737,800
                                                        ----------

         6)       SHARED VOTING POWER                   0
                                                        ----------

         7)       SOLE DISPOSITIVE POWER                737,800
                                                        ----------

         8)       SHARED DISPOSITIVE POWER              0
                                                        ----------

9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
    BY EACH REPORTING PERSON                            737,800
                                                        ----------
10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9)
    EXCLUDES CERTAIN SHARES                     [ X ]

    Excludes 442,900 shares of the Issuer's  Common  Stock  owned  of  record by
    Quaker Capital Partners II, L.P.


11) PERCENT OF CLASS REPRESENTED BY
    AMOUNT IN ROW (9)                                   6.25%
                                                        ----------

12) TYPE OF REPORTING PERSON                            PN
                                                        ----------

                               Page 3 of 15 Pages


                                  SCHEDULE 13G
                               CUSIP NO. 71376K102


1) NAME OF REPORTING PERSON

Quaker Premier, L.P.
-------------------------------------

         S.S. OR I.R.S. IDENTIFICATION
         NO. OF ABOVE PERSON                            25-1778068
                                                        -----------

2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

                                                                    (a)   [    ]
                                                                    (b)   [    ]
3) SEC USE ONLY

4) CITIZENSHIP OR PLACE OF ORGANIZATION                 Delaware
                                                        -----------
NUMBER OF SHARES BENEFICIALLY OWNED BY
EACH REPORTING PERSON WITH:

         5)       SOLE VOTING POWER                     737,800
                                                        -----------

         6)       SHARED VOTING POWER                   0
                                                        -----------

         7)       SOLE DISPOSITIVE POWER                737,800
                                                        -----------

         8)       SHARED DISPOSITIVE POWER              0
                                                        -----------

9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
    BY EACH REPORTING PERSON                            737,800
                                                        -----------

10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9)
    EXCLUDES CERTAIN SHARES                     [ X ]

    Excludes  442,900 shares  of the  Issuer's  Common  Stock owned of record by
    Quaker Capital Partners II, L.P.


11) PERCENT OF CLASS REPRESENTED BY
    AMOUNT IN ROW (9)                                   6.25%
                                                        ------------

12) TYPE OF REPORTING PERSON                            PN
                                                        ------------

                               Page 4 of 15 Pages


                                  SCHEDULE 13G
                               CUSIP NO. 71376K102

1) NAME OF REPORTING PERSON

Quaker Capital Partners II, L.P.
-------------------------------------

         S.S. OR I.R.S. IDENTIFICATION
         NO. OF ABOVE PERSON                            11-3667966
                                                        ----------

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

4) CITIZENSHIP OR PLACE OF ORGANIZATION                 Delaware
                                                        ------------
NUMBER OF SHARES BENEFICIALLY OWNED BY
EACH REPORTING PERSON WITH:

         5)       SOLE VOTING POWER                     442,900
                                                        ------------

         6)       SHARED VOTING POWER                   0
                                                        ------------

         7)       SOLE DISPOSITIVE POWER                442,900
                                                        ------------

         8)       SHARED DISPOSITIVE POWER              0
                                                        ------------

9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
    BY EACH REPORTING PERSON                            442,900
                                                        ------------

10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9)
    EXCLUDES CERTAIN SHARES                     [ X ]

    Excludes  737,800  shares of the  Issuer's  Common  Stock owned of record by
    Quaker Capital Partners I, L.P.


11) PERCENT OF CLASS REPRESENTED BY
    AMOUNT IN ROW (9)                                   3.75%
                                                        ------------

12) TYPE OF REPORTING PERSON                            PN
                                                        ------------

                               Page 5 of 15 Pages


                                  SCHEDULE 13G
                               CUSIP NO. 71376K102

1) NAME OF REPORTING PERSON

Quaker Premier II, L.P.
-------------------------------------

         S.S. OR I.R.S. IDENTIFICATION
         NO. OF ABOVE PERSON                            30-0135937
                                                        ----------

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

4) CITIZENSHIP OR PLACE OF ORGANIZATION                 Delaware
                                                        ----------
NUMBER OF SHARES BENEFICIALLY OWNED BY
EACH REPORTING PERSON WITH:

         5)       SOLE VOTING POWER                     442,900
                                                        ----------

         6)       SHARED VOTING POWER                   0
                                                        ----------

         7)       SOLE DISPOSITIVE POWER                442,900
                                                        ----------

         8)       SHARED DISPOSITIVE POWER              0
                                                        ----------

9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
    BY EACH REPORTING PERSON                            442,900
                                                        ----------

10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9)
    EXCLUDES CERTAIN SHARES                     [ X ]

    Excludes 737,800 shares  of  the  Issuer's  Common  Stock owned of record by
    Quaker Capital Partners I, L.P.


11) PERCENT OF CLASS REPRESENTED BY
    AMOUNT IN ROW (9)                                   3.75%
                                                        ----------

12) TYPE OF REPORTING PERSON                            PN
                                                        ----------

                               Page 6 of 15 Pages


                                  SCHEDULE 13G
                               CUSIP NO. 71376K102

1) NAME OF REPORTING PERSON

Mark G. Schoeppner
-------------------------------------



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

4) CITIZENSHIP OR PLACE OF ORGANIZATION                 United States
                                                        of America
                                                        -------------
NUMBER OF SHARES BENEFICIALLY OWNED BY
EACH REPORTING PERSON WITH:

         5)       SOLE VOTING POWER                     0
                                                        -------------

         6)       SHARED VOTING POWER                   0
                                                        -------------

         7)       SOLE DISPOSITIVE POWER                0
                                                        -------------

         8)       SHARED DISPOSITIVE POWER              0
                                                        -------------

9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
    BY EACH REPORTING PERSON                            0
                                                        -------------

10) CHECK BOX IF THE AGGREGATE  AMOUNT IN ROW (9)
    EXCLUDES CERTAIN SHARES                     [ X ]

    Mark G. Schoeppner  disclaims  beneficial ownership of 1,180,700 shares   of
    the  Issuer's  Common  Stock  that may be deemed to be  beneficially   owned
    by Quaker Capital  Partners I, L.P. and Quaker  Capital  Partners  II,  L.P.

11) PERCENT OF CLASS REPRESENTED BY
    AMOUNT IN ROW (9)                                   0%
                                                        -------------

14) TYPE OF REPORTING PERSON                            IN
                                                        -------------
                               Page 7 of 15 Pages


                                  SCHEDULE 13G
                               CUSIP NO. 71376K102

Item 1.

         (a)      Name of Issuer

                  PERFORMANCE TECHNOLOGIES, INC.
                  --------------------------------------------------------------

         (b)      Address of Issuer's Principal Executive Offices

                  1414 Avenue of the Americas, New York, NY  10019
                  --------------------------------------------------------------
Item 2.

         (a)      Names of Persons Filing

                  Quaker Capital Management Corporation
                  Quaker Capital Partners I, L.P.
                  Quaker Capital Partners II, L.P.
                  Quaker Premier, L.P.
                  Quaker Premier II, L.P.
                  Mark G. Schoeppner
                  --------------------------------------------------------------

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

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

         (c)      Citizenship

                  Quaker Capital Management Corporation - Pennsylvania
                                                          Corporation

                  Quaker Capital Partners I, L.P. - Delaware partnership
                  Quaker Capital Partners II, L.P.- Delaware partnership
                  Quaker Premier, L.P. - Delaware partnership
                  Quaker Premier II, L.P. - Delaware partnership
                  Mark G. Schoeppner - United States citizen
                  --------------------------------------------------------------

         (d)      Title of Class of Securities

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

         (e)      CUSIP Number

                  71376K102
                  --------------------------------------------------------------

                               Page 8 of 15 Pages



                                  SCHEDULE 13G
                               CUSIP NO. 71376K102

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
                  ---------

         QUAKER CAPITAL MANAGEMENT CORPORATION:

         (a) Amount Beneficially Owned: 1,180,700

                  The  filing  of  this  report  shall  not be  construed  as an
                  admission that Quaker Capital  Management  Corporation is, for
                  purposes of Section 13(d) or 13(g) of the Act or for any other
                  purposes,  the beneficial  owner of these  securities.  Quaker
                  Capital Management

                               Page 9 of 15 Pages


                                  SCHEDULE 13G
                               CUSIP NO. 71376K102

                  Corporation disclaims beneficial ownership
                  of all 1,180,700 shares covered by this Schedule 13G.

         (b) Percent of Class: 10.01%

         (c)

           (i)   Sole power to vote or direct the vote: 1,180,700

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

           (iii) Sole power to dispose or direct the disposition of: 1,180,700

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

         QUAKER CAPITAL PARTNERS I, L.P.:

         a) Amount Beneficially Owned: 737,800

                  The  filing  of  this  report  shall  not be  construed  as an
                  admission  that  Quaker  Capital  Partners  I,  L.P.  is,  for
                  purposes of Section 13(d) or 13(g) of the Act or for any other
                  purposes,  the beneficial  owner of these  securities.  Quaker
                  Capital  Partners I, L.P.  disclaims  beneficial  ownership of
                  442,900 shares covered by this Schedule 13G.

         (b) Percent of Class: 6.25%

         (c)

           (i)   Sole power to vote or direct the vote: 737,800

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

           (iii) Sole power to dispose or direct the disposition of: 737,800

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

         QUAKER PREMIER, L.P.:

         a) Amount Beneficially Owned: 737,800

                  The  filing  of  this  report  shall  not be  construed  as an
                  admission  that  Quaker  Premier,  L.P.  is, for  purposes

                              Page 10 of 15 Pages


                                  SCHEDULE 13G
                               CUSIP NO. 71376K102

                  of  Section  13(d)   or   13(g)  of the Act or for  any  other
                  purposes, the beneficial  owner of  these  securities.  Quaker
                  Premier, L.P. disclaims beneficial ownership of 442,900 shares
                  covered by this Schedule 13G.

         (b) Percent of Class: 6.25%

         (c)

           (i)   Sole power to vote or direct the vote: 737,800

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

           (iii) Sole power to dispose or direct the disposition of: 737,800

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

         QUAKER CAPITAL PARTNERS II, L.P.:

         a) Amount Beneficially Owned: 442,900

                  The  filing  of  this  report  shall  not be  construed  as an
                  admission  that  Quaker  Capital  Partners  II,  L.P.  is, for
                  purposes of Section 13(d) or 13(g) of the Act or for any other
                  purposes,  the beneficial  owner of these  securities.  Quaker
                  Capital Partners II, L.P.  disclaims  beneficial  ownership of
                  737,800 shares covered by this Schedule 13G.

         (b) Percent of Class: 3.75%

         (c)

           (i)   Sole power to vote or direct the vote: 442,900

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

           (iii) Sole power to dispose or direct the disposition of: 442,900

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

         QUAKER PREMIER II, L.P.:

         a) Amount Beneficially Owned: 442,900

                              Page 11 of 15 Pages



                                  SCHEDULE 13G
                               CUSIP NO. 71376K102


                  The  filing  of  this  report  shall  not be  construed  as an
                  admission  that Quaker  Premier II, L.P.  is, for  purposes of
                  Section  13(d) or 13(g) of the Act or for any other  purposes,
                  the beneficial owner of these  securities.  Quaker Premier II,
                  L.P. disclaims  beneficial ownership of 737,800 shares covered
                  by this Schedule 13G.

         (b) Percent of Class: 3.75%

         (c)

           (i)   Sole power to vote or direct the vote: 442,900

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

           (iii) Sole power to dispose or direct the disposition of: 442,900

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

         MARK G. SCHOEPPNER:

         a) Amount Beneficially Owned: 0

                  The  filing  of  this  report  shall  not be  construed  as an
                  admission that Mark G.  Schoeppner is, for purposes of Section
                  13(d)  or  13(g)  of the Act or for any  other  purposes,  the
                  beneficial  owner  of  these  securities.  Mark G.  Schoeppner
                  disclaims beneficial ownership of all 1,180,700 shares covered
                  by this Schedule 13G.

         (b) Percent of Class: 0%

         (c)

           (i)   Sole power to vote or direct the vote: 0

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

           (iii) Sole power to dispose or direct the disposition of: 0

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

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

                              Page 12 of 15 Pages


                                  SCHEDULE 13G
                               CUSIP NO. 71376K102

                  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

                  All  1,180,700 of the shares with respect to which this report
is filed are owned by a variety of investment advisory clients of Quaker Capital
Management  Corporation,  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.

Item 10. Certification

         By signing  below I certify  that, to  the best of  my  knowledge   and
belief, the securities  referred to above were acquired 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.

                              Page 13 of 15 Pages



                                  SCHEDULE 13G
                               CUSIP NO. 71376K102


January 29, 2008                    QUAKER CAPITAL MANAGEMENT CORPORATION

                                    /s/ Mark G. Schoeppner
                                    --------------------------------------------
                                    Mark G. Schoeppner, President


                                    QUAKER CAPITAL PARTNERS I, L.P.

                                    By: Quaker Premier, L.P., its general
                                        partner

                                        By: Quaker Capital Management
                                            Corporation, its general partner


                                        By: /s/ Mark G. Schoeppner
                                            ------------------------------------
                                            Mark G. Schoeppner
                                            President


                                    QUAKER PREMIER, L.P.

                                    By: Quaker Capital Management Corporation,
                                        its general partner


                                        By: /s/ Mark G. Schoeppner
                                        --------------------------
                                        Mark G. Schoeppner
                                        President


                                    QUAKER CAPITAL PARTNERS II, L.P.

                                    By: Quaker Premier II, L.P., its general
                                        partner

                                        By: Quaker Capital Management
                                            Corporation, its general partner


                                        By: /s/ Mark G. Schoeppner
                                            ------------------------------------
                                            Mark G. Schoeppner
                                            President


                              Page 14 of 15 Pages


                                  SCHEDULE 13G
                               CUSIP NO. 71376K102


                                    QUAKER PREMIER II, L.P.

                                    By: Quaker Capital Management Corporation,
                                        its general partner


                                        By: /s/ Mark G. Schoeppner
                                            ------------------------------------
                                            Mark G. Schoeppner
                                            President



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



                              Page 15 of 15 Pages