Fighting with a Kenwood
My first Tracker project was an OT+, Garmin eTrex, and my FT-60r. With that, I built the radio interface to be a kind of RJ-45 female to DB-9 connector (with an extraneous 9v battery connector to power the OT+). The idea was that I could switch out radios fairly easily by standardizing the RJ-45. I had picked up the Yaesu HT to RJ-45 connector from Argent. and mapped the RJ-45 like this:
Band closest to the 'hilt' is ground
Next band isn't used
Next band is PTT/Mic
Tip is speaker.
Now, I'm in trouble because the Kenwood HT has separated PTT and Mic (I think) and I don't know how to map that to the DB9 of the radio connector. I picked up the Kenwood HT to RJ-45 Cable and noticed that it has one more wire than the Yaesu version going to the RJ-45 jack.
Does anyone know how those 4 wires should map to the DB9 of the OT2m? Here's the schematic of the connector. I've figured out:
Tip of the small jack is the speaker (Pin 5 on DB9, Audio in)
Shaft of the small jack is ground (Pin 6)
The middle band of the large jack would be the PTT/Mic on a Yaesu, so it's mapped to Pin 1 (audio out), which works cuz I'll see the rec'v data coming in, but it won't key up to send.
If I tie the shaft of both jacks to ground, it keys up steady (all the time), so that last wire has to be the one telling it to key, but I don't know where to map it on the DB9.
And thank you!