Radio Mods Database

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                                                  KENWOOD TH-45A
                                                   ~~~~~~~~~~~~~~~~~~
                                                       EXPANDED RF

 1- DISCONNECT POWER AND ANTENNA. 
2- Remove the volume. squelch and tuning control knobs.
3- Remove the nuts from the volume control and tuning controls
4- Remove the screws located by the PTT switch.
5- Remove the screws by the speaker jack.
6- Remove the screws from the battery plate.
7- Carefully pull the front panel from the radio. Do not break any wires.
8- Gently lift the top panel from the radio by pulling it forward and then 
Upwards. The O ring on the BNC connector will cause same tension.
9- Rotate the top the panel towards the front of the radio to expose the 
.75" x .75" board.
10- Remove chip resistor R-18 and R-28.
11- Reset the radio
12- Reset the CPU (hold down [M] and turn the power ON.

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
                             


All the mods are captured by Packet. 
KB2LJJ    Radio Mods Database 
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.

      Email                kb2ljj@pacnews.com

 73's
   John Ribeiro
             KB2LJJ