TNC-Pi User Guide
-12-
6/25/2017
Parts Layout (for TNC-Pi 2)
Connecting the Radio
You can either wire up a 9 pin D-Sub plug to mate with the one on the TNC-Pi, or, if
you’d prefer, you can use the four holes below
R7
labeled
Radio
to hard wire a radio
connection. (No header is provided in the kit for this.)
If you use the 9 pin D-Sub connection, it should be wired as follows:
Pin 1 (the square pad): TX Audio
Pin 3: Push to Talk (PTT)
Pin 5: Receive Audio
Pin 6: Ground
If you are u
sing the holes marked “Radio” the connections should be:
Pin 1 (the square pad): Receive Audio
Pin 2: Ground
