Washington, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


        Date of Report (Date of earliest event reported): April 20, 2004

                                VICOR CORPORATION
               (Exact name of Registrant as specified in charter)

          Delaware                        0-18277                 04-2742817
----------------------------      ------------------------   -------------------
(State or other jurisdiction      (Commission file number)      (IRS employer
      of incorporation)                                      identification no.)

                 25 Frontage Road, Andover, Massachusetts 01810
               (Address of principal executive offices) (Zip Code)

                                 (978) 470-2900
              (Registrant's telephone number, including area code)

              (Former name, former address and former fiscal year,
                         if changed since last report)

Item 7.  Exhibits.

(c) Exhibits. The following exhibit is being furnished herewith:

Number     Title
-------    -----
99.1       Vicor Corporation's press release dated April 20, 2004.

Item 12.  Results of Operations and Financial Condition.

On April 20, 2004, Vicor Corporation issued a press release announcing its
financial results for the first quarter of 2004. The full text of that press
release is attached as Exhibit 99.1 hereto and incorporated by reference herein.
The information furnished under this Item 12, including the Exhibit attached
hereto, shall not be deemed "filed" for any purpose, including for purposes of
Section 18 of the Securities and Exchange Act of 1934 (the "Exchange Act") or
otherwise subject to the liabilities of that section, nor shall it be deemed
incorporated by reference in any filing under the Securities Act of 1933 or the
Exchange Act, regardless of any general incorporation language in such filing.

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         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                       VICOR CORPORATION

Dated: April 20, 2004                  By:  /s/ Mark A. Glazer
                                       Name:  Mark A. Glazer
                                       Title:   Chief Financial Officer

                                  EXHIBIT INDEX

Number     Title
-------    -----
99.1       Vicor Corporation's press release dated April 20, 2004.