Today I was browsing through the SOTA-reflector (the SOTA forum if you like to call it so). I found an interesting post from Richard, G3CWI about a new chinese developed 1W datamode TRX with built-in VOX. So you don't need any CAT to trigger the PTT. I checked out the groups.io thread (DSB transceiver for Digital mode) with lots of useful questions and information. Especially paired with a raspberry pi that would be an ideal SOTA and /P rig I guess.
- Crystal controlled single frequency DSB transceiver for 20m (14.074MHz), 40m (7.074MHz) or 80m (3.573MHz), other frequencies could be added per request. 80m is not ready yet.
- Power supply: 10-14V DC regulated power supply or battery pack, 12V is recommended, center positive, reverse polarity protection available