After some debugging and measurements, I finally got my PK-96 working with my Kenwood TS-2000X where I use the TS-2000X ACC2 connector. The problem was that when one uses pin 13 PTT the TX audio from the PK-96 is muted. This pin is normally used for a foot switch and not for an external modem. So after I switched pin 13 to pin 9 on the ACC2 connector everything was working. ISS packet here I come.
Image | pin | function | remark |
1 | TX | audio to radio | |
2 | GND | ground | |
3 | PTT | push to talk | |
4 | RX | audio from radio | |
5 | SQ | squelch | |
Image | pin | function | remark |
1 | RX | audio sub radio | |
2 | RTTY | key input | |
3 | RX | audio main radio | |
4 | GND | ground | |
5 | SQ | squelch main radio | |
6 | NC | not connected | |
7 | SQ | squelch sub radio | |
8 | GND | ground | |
9 | PTT | push to talk, audio not muted | |
10 | NC | not connected | |
11 | TX | audio in radio | |
12 | GND | ground | |
13 | PTT | push to talk audio is muted |