EXHIBIT (aa)
                           SECURED PROMISSORY NOTE
                           -----------------------

$400,000.00                  Nashville, Tennessee          March 1, 1998

        FOR VALUE RECEIVED, RadioSunGroup of Texas, Inc. ("Maker"), promises
to pay to the order of Young Investments Company (a Nevada Partnership), the
sum of Four Hundred Thousand and No/100 Dollars ($400,000.00), together with
all interest thereon at the fixed rate of TEN Percent (10%) per annum. Accrued
interest shall be due and payable on March 31, 1998 and on the final day of
each successive calendar month thereafter.  Provided, however, on June 30,
1998, all principal and interest then unpaid shall be finally due and payable.

        All amounts due under this Note are payable at par in lawful money of
the United States of America, at such place as the holder hereof (hereinafter
"Holder") may direct.

        A default shall occur under this Note if Maker fails to make the
payment required hereunder when due (time is of the essence hereof); or if
Maker becomes insolvent, or if Maker files bankruptcy or receivership
proceedings or has such proceedings filed against it; or if any property of
Maker is subjected to attachment, execution or other process; or if a default
occurs under any collateral document securing the indebtedness evidenced by
this Note.

        Upon the occurrence of a default, as defined above. Holder may, at its
option, declare all principal and interest provided for under this Note, and
any other obligations of Maker to Holder, to be presently due and payable, and
Holder may enforce any remedies available to Holder under any documents
securing or evidencing, debts of Maker to Holder.  Holder may waive any
default before or after it occurs and may restore this Note in full effect
without impairing the right to declare it due for a subsequent default.
Following default, interest shall accrue on the principal balance hereof at
the maximum lawful rate. Privilege is reserved to prepay this Note at any
time.  Provided, however, if this Note is prepaid, regardless of the date of
prepayment, such prepayment shall be accompanied by such additional sums as
may be required to ensure that Holder receives a full four months interest on
this Note.  For example, if this Note is prepaid on February 1, 1998 (and
assuming the regular interest payment was made as scheduled on March 31,
1998), the prepayment shall be accompanied by an additional three months of
interest as if the Note were paid in full on its maturity date of June 30,
1998.

        Maker and all sureties, guarantors, endorsers and other parties to
this instrument hereby consent to any and all renewals, waivers,
modifications, or extensions of time (of any duration) that may be granted by
Holder with respect to this Note and severally waive demand, presentment,
protest, notice of dishonor, and all other notices which might otherwise be
required by law. Holder may release collateral securing this Note or parties
liable therefor, in its sole discretion.

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        Maker's performance under the terms of this Note is secured by, and
Maker hereby grants Holder a security interest in all of Maker's presently
owned and hereafter acquired personal property and fixtures including all
accounts receivable, equipment, goods, contract rights, general intangibles,
furniture and other property of Maker.

        Maker and all sureties, guarantors, endorsers and other parties hereto
agree to pay reasonable attorneys' fees and all court and other costs that
Holder may incur in the course of efforts to collect the debt evidenced hereby
or to protect Holder's interest in any collateral securing the same.

        If any provision of this Note should for any reason be invalid or
unenforceable, the other provisions hereof shall remain in full effect.

        Words used herein indicating gender or number shall be read as context
may require.

        The provisions of this Note may be amended or waived only by
instrument in writing signed by the Holder and Maker hereof and attached to
this Note.

                              RADIOSUNGROUP OF TEXAS, INC.




                              By: /s/ John W. Biddinger
                                  -----------------------------
                                      JOHN W. BIDDINGER
                                      CHAIRMAN & PRESIDENT


For good and valuable consideration,
SunGroup, Inc. hereby guarantees to
Holder the timely payment and
performance of this Note.
SunGroup, Inc.'s guarantee of this
Note is absolute and unconditional.
SunGroup, Inc.'s guarantee of the
attached Note is irrevocable.
This guarantee constitutes a
guarantee of payment and
performance and not of collection.


Executed this 1st day of March, 1998.


SUNGROUP, INC.


By: /s/ JAMES A. HOETGER
   ---------------------------
        JAMES A. HOETGER
        VICE PRESIDENT/CHIEF FINANCIAL OFFICER

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                        [FORM OF FINANCING STATEMENT]



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