AMENDMENT TO AGREEMENT OF SALE AND ESCROW AGREEMENT

     THIS AMENDMENT TO AGREEMENT OF SALE (this "Amendment") is made and entered
into as of the 10th day of November, 1996, between CEEBRAID-SIGNAL CORPORATION,
a Florida corporation ("Purchaser"), GLENEAGLES INVESTORS A REAL ESTATE LIMITED
PARTNERSHIP, an Illinois Limited Partnership ("Seller") and PARTNERS TITLE
COMPANY, agent for Chicago Title Insurance Company ("Escrow Agent").

                             W I T N E S S E T H:

     WHEREAS, Seller and Purchaser are parties to that certain Agreement of
Sale entered into as of October 24, 1996 (the "Original Agreement"), pursuant
to which Seller agreed to sell to Purchaser, and Purchaser agreed to purchase
from Seller, the "Property" (as defined in the Original Agreement); 

     WHEREAS, Seller, Purchaser and Escrow Agent are parties to that certain
Escrow Agreement entered into as of October ___, 1996 (the "Original Escrow
Agreement"); 

     WHEREAS, Seller and Purchaser now desire to amend the Original Agreement
and the Original Escrow Agreement pursuant to the terms and provisions set
forth herein.

     NOW, THEREFORE, for and in consideration of the premises and mutual
agreements contained herein, the payment of Ten and No/100 Dollars ($10.00) and
other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, Seller and Purchaser hereby agree as follows:

     1.   All capitalized terms used in this Amendment, to the extent not
otherwise expressly defined herein, shall have the same meanings ascribed to
such terms in the Original Agreement.

     2.   Lines one (1) and two (2) of Paragraph 8 of the Original Agreement
are hereby deleted in their entirety, and the following is hereby inserted in
lieu thereof: "8.  CLOSING.  The Closing ("Closing") of this transaction shall
be on January 6, 1997 ("Closing Date"), at the office of the Title Insurer, at
which time Seller shall deliver".

     3.   Line one (1) of Paragraph 2 of the Escrow Agreement is hereby deleted
in its entirety and the following is hereby inserted in lieu thereof:  "On
January 6, 1996, or at such other date as Seller and Purchaser may, in".

     4.   Except as amended herein, the terms and conditions of the Original
Agreement and the Original Escrow Agreement shall continue in full force and
effect and are hereby ratified in their entirety.

     5.   This Amendment may be executed in multiple counterparts, each of
which shall be deemed to be an original, but all of which together shall
constitute one and the same agreement.
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     6.   The parties hereto agree and acknowledge that a facsimile copy of any
party's signature on this Amendment shall be enforceable against such party as
an original.  

     Executed as of the date first written above.


                              PURCHASER:

                              CEEBRAID-SIGNAL CORPORATION,
                              a Florida corporation

                              By:  /s/Richard Schlesinger
                                   ---------------------------------
                              Name: Richard Schlesinger
                                   ---------------------------------
                              Its: Managing Director
                                   ---------------------------------

                              SELLER:

                              GLENEAGLES INVESTORS A REAL ESTATE LIMITED
                              PARTNERSHIP, an Illinois limited partnership

                              By:  Balcor Equity Partners-IV, an Illinois
                                   general partnership, its general partner

                                   By:  The Balcor Company, a Delaware
                                        corporation, a general partner


                                        By:  /s/James E. Mendelson
                                             --------------------------------
                                        Name: James E. Mendelson
                                             --------------------------------
                                        Its: SR. V.P.
                                             --------------------------------

                              ESCROW AGENT:

                              PARTNERS TITLE COMPANY, agent for Chicago Title
                              Insurance 


                              By:
                                   ------------------------------------
                              Name:
                                   ------------------------------------
                              Its:
                                   ------------------------------------
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