Date: 13 Mar 89 16:07:03 GMT

From: oliveb!pyramid!prls!philabs!briar.philips.com!rfc
 Casey;6282;3.57;$0201)

Subject: tiny-2 tnc fix



 copied from packet:

 Msg# TSP  Size Read To    
 25853 BN   1240    0 ALL           N2EZG  8903/1617

 Subject: Paccomm Tiny-2 Factory Mod



       Here is the "Factory" fix for Pac-Comm Tiny-2's & Micro-Power 2's

       that have become hard of hearing.  It seems that Pac-Comm has some

       boards out that work fine when new, but with age the tnc requires

       a huge amount of Audio input from the speaker jack or it won't

       decode properly.  They are lost as to what is deterioating in the

       boards but offer this fix to its customers.

        It is quite simple and very neat, all parts are mounted on the

        under-

        side of a 16 pin IC socket, the Modem chip TCM3105 (U16) is

        removed,

        the modified socket is inserted into existing socket on TNC's

        board,

        and the modem chip is re-installed.



        Parts Needed:

        1 - 16 pin IC socket

        1 - 2222 Transistor NPN (EGC 123AP)

        2 - 10000 ohm 5% resistors (brown-black-orange-gold)



        Instructions:

         Solder 1 resistor to Emitter, other end of resistor to pin 12

          Solder 1 resistor to Base, other end to pin 2

           Solder collector to pin 5

           >EndFile<


SOURCE: The QRZ Windows Ham Radio CDROM