Radio Mods Database

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                                                 KENWOOD TH 25

KENWOOD TH-series HT TNC Interconnection

The following is a suggested circuit for connecting a packet TNC
to a Kenwood TH-series HT. Included is the TH-21/31/41, the TH-
205/215/315/415, and the new TH-25/45 series HTs.

The connections are as follows:

A sub-miniature plug is used for receive audio. The tip of
this plug is audio out; the sleeve of this plug is the
common ground for PTT, transmit audio, and receive audio.

A miniature stereo plug is used for transmit audio and PTT.
Connect the middle "ring" of the plug to the TNC audio out
through a 0.2 uf cap (for DC isolation). Connect the sleeve
of the plug to the TNC PTT. The plug's tip is unused.

Set the TNC audio for 50 to 80 mv audio output into a 2K ohm
impedance.ÿ



                             


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take now responsibility or liability for any 
damage resulting from this modification.  
                                  
 I have been trying to help our ham radio with the radio modifications and have asked for any type of new radio mods.
 However, I haven't received too many.  If all of you contributed a little more,  I believe I would be able to help 
all the other ham's that are looking for these mods. I know it is possible to get more mods from all the Ham's because of
 the wide range that exist throughout the world.  By doing this we can  flourish and enjoy more of this hobby that 
we've taken part in for so many years. Furthermore, I ask you not to forget to send me any modifications that you might
 have through email.  I would really appreciate it.

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 73's
   John Ribeiro
             KB2LJJ