Document:

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                                                                    Exhibit 4.2

                  FIRST AMENDMENT TO STOCK PURCHASE AGREEMENT

         This FIRST AMENDMENT TO STOCK PURCHASE AGREEMENT (this "Agreement") is
made and entered into as of June 27, 2000, by and between Sunrise Television
Partners, L.P., a Delaware limited partnership ("Seller"), and Smith
Broadcasting Partners, L.P., a Delaware limited partnership ("Buyer"), and is
joined in by Sunrise Television Corp., a Delaware corporation (the "Company"),
and the other signatories hereto.

                                    RECITALS

         A.       The parties hereto are parties to that certain Stock Purchase
Agreement dated as of March 13, 2000 (the "Purchase Agreement"); and

         B.       In order to carry out the intention of the parties under the
Purchase Agreement and to comply with the requirements of the Federal
Communications Commission, the parties hereto desire to amend the Purchase
Agreement as provided herein.

                                   AGREEMENT

         NOW, THEREFORE, in consideration of the mutual promises and covenants
as set forth herein, the parties hereto agree as follows:

         1.       Amendment. Exhibit A to the Purchase Agreement is hereby
amended and restated to read in its entirety as set forth on Exhibit A attached
hereto.

         2.       Purchase Agreement Otherwise Unchanged. Except as expressly
amended hereby, the Purchase Agreement shall remain unchanged and in full force
and effect.

         3.       Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall constitute one and the same instrument.

         4.       Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE, WITHOUT REGARD
TO THE CONFLICTS OF LAWS PRINCIPLES THEREOF.

            [THE REMAINDER OF THIS PAGE IS INTENTIONALLY LEFT BLANK]

<PAGE>   2

         IN WITNESS WHEREOF, the undersigned have each caused this Agreement to
be executed as of the date first written above.

                                            BUYER:

                                            SMITH BROADCASTING PARTNERS, L.P.

                                            By: Smith Broadcasting Group, Inc.

                                            By: /s/ David A. Fitz
                                            -----------------------------------
                                            Name:   David A. Fitz
                                            Title:  Chief Financial Officer and
                                                    Executive Vice President

                                            SELLER:

                                            SUNRISE TELEVISION PARTNERS, L.P.

                                            By: HM3/Sunrise L.P.,
                                                its general partner

                                            By: HM3/Sunrise, Inc.,
                                                its general partner

                                            By: /s/ Eric C. Neuman
                                            -----------------------------------
                                            Name:   Eric C. Neuman
                                            Title:  Vice President

                                            COMPANY:

                                            SUNRISE TELEVISION CORP.

                                            By: /s/ David A. Fitz
                                            -----------------------------------
                                            Name:   David A. Fitz
                                            Title:  Chief Financial Officer

<PAGE>   3

                                            SMITH BROADCASTING GROUP, INC.

                                            By: /s/ David A. Fitz
                                            -----------------------------------
                                            Name:   David A. Fitz
                                            Title:  Chief Financial Officer and
                                                    Executive Vice President

                                                /s/ Sandy DiPasquale
                                                -------------------------------
                                                    Sandy DiPasquale

                                                /s/ John Purcell
                                                -------------------------------
                                                    John Purcell

                                                /s/ David A. Fitz
                                                -------------------------------
                                                    David A. Fitz

<PAGE>   4

                                   EXHIBIT A

            SECOND AMENDED AND RESTATED CERTIFICATE OF INCORPORATION<PAGE>   1

                                                                    Exhibit 4.3

                            CERTIFICATE OF AMENDMENT
                                       TO
                       CERTIFICATE OF DESIGNATION OF THE
                         14% REDEEMABLE PREFERRED STOCK

                         Pursuant to Section 242 of the
                        Delaware General Corporation Law

         The undersigned Chief Executive Officer of STC Broadcasting, Inc., a
Delaware corporation (the "Corporation"), certifies that pursuant to authority
granted to and vested in the Board of Directors of the Corporation (the
"Board") by the provisions of the Amended and Restated Certificate of
Incorporation of the Corporation and in accordance with the provisions of
Section 242 of the General Corporation Law of the State of Delaware, the Board
has duly adopted the following resolutions amending the STC Broadcasting, Inc.
Certificate of Designation of the Powers, Preferences and Relative,
Participating, Optional and Other Special Rights of 14% Redeemable Preferred
Stock and Qualifications, Limitations and Restrictions Thereof, as amended on
March 18, 1997 (the "Certificate of Designation"):

         WHEREAS, the Board is authorized, within the limitations and
restrictions stated in the Amended and Restated Certificate of Incorporation of
the Corporation to fix by resolution or resolutions the designation of each
series of stock and the powers, preferences and such other subjects or matters
as may be fixed by resolution or resolutions of the Board under the General
Corporation Law of the State of Delaware; and

         WHEREAS, pursuant to such authority granted to the Board, the
Corporation filed the Certificate of Designation with the Secretary of State of
the State of Delaware effective as of February 28, 1997, as amended on March
18, 1997; and

         WHEREAS, pursuant to Section 242 of the General Corporation Law of the
State of Delaware, it is the desire of the Board, pursuant to its authority as
aforesaid, to amend and restate paragraph (a) of the Certificate of Designation
to increase the amount of designated shares of the Corporation's 14% Redeemable
Preferred Stock to 597,000 shares as hereinafter set forth in order to have a
sufficient number of shares to pay dividends in additional whole shares of 14%
Redeemable Preferred Stock, which amendment has been approved by the requisite
consent of the stockholders of the Corporation.

         NOW, THEREFORE, BE IT RESOLVED, that the proposal by the Board to
amend and restate paragraph (a) of the Certificate of Designation to read in
its entirety as follows, be, and it hereby is, authorized, approved and adopted
in all respects:

         (a)      Designation. There is hereby created out of the authorized
and unissued shares of Preferred Stock of the Corporation a class of Preferred
Stock designated as "14% Redeemable Preferred Stock." The number of shares
constituting such class shall be 597,000. The initial liquidation preference of
the Redeemable Preferred Stock shall be $100.00 per share.

         IN WITNESS WHEREOF, the undersigned has executed this Certificate as
of the 30th day of August, 2000.

                                          STC BROADCASTING, INC

                                          /s/ Robert N. Smith
                                          -------------------------------------
                                          Name:    Robert N. Smith
                                          Title:   Chief Executive Officer<PAGE>   1

                                                                    Exhibit 4.4

                                August 30, 2000

Sunrise Television Partners, L.P. (the "Partnership")
720 Second Avenue South, Suite 420
St. Petersburg, Florida 33701

         Re: Sunrise Television Corp., a Delaware corporation (the "Company")

Gentlemen:

         This letter confirms that at such time, if ever, as the 891,499 shares
of Class B Common Stock, par value $.01 per share ("Nonvoting Stock"), of the
Company held by the Partnership after completion of the proposed
recapitalization of the Company are converted, in accordance with the
applicable provisions of the Company's Articles (as defined below), into
891,499 shares of Class A Common Stock, par value $.01 per share ("Voting
Stock"), of the Company, the undersigned shall cooperate fully to cause the 1
share of Voting Stock held by Smith Broadcasting Partners, L.P., a Delaware
limited partnership, after completion of the proposed recapitalization of the
Company, which share would then represent less than 1% of the total outstanding
Voting Stock of the Company, to be redeemed, repurchased, or extinguished, with
any amounts received therefor to be netted out of distributions otherwise
payable to Smith Broadcasting Group, Inc., Sandy DiPasquale, John Purcell and
David Fitz as holders of Class B Interests in the Partnership.

         Capitalized terms used herein and not otherwise defined shall have the
meaning given to same in the Second Amended and Restated Articles of
Incorporation of the Company, to be filed with the Secretary of State of the
State of Delaware on the date hereof (the "Articles").

         The undersigned acknowledges that you are relying on this letter in
making your investment in the Company and the addressees of this letter.

                                        Very truly yours,

                                        SMITH BROADCASTING PARTNERS, L.P.

                                        By: Smith Broadcasting Group, Inc.,
                                            Its General Partner

                                        By: /s/ David A. Fitz
                                        ---------------------------------------
                                                David A. Fitz
                                                Chief Financial Officer and
                                                Executive Vice President

                                        SUNRISE TELEVISION CORP.

                                        By: /s/ David A. Fitz
                                        ---------------------------------------
                                                David A. Fitz
                                                Chief Financial Officer

                                        SMITH BROADCASTING GROUP, INC.

                                        By: /s/ David A. Fitz
                                        ---------------------------------------
                                                David A. Fitz
                                                Chief Financial Officer

                                            /s/ Sandy DiPasquale
                                            -----------------------------------
                                                Sandy DiPasquale

                                            /s/ John Purcell
                                            -----------------------------------
                                                John Purcell

                                            /s/ David A. Fitz
                                            -----------------------------------
                                                David A. Fitz

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