Update:
There is voodoo in this uBitx. I did nothing more than start measuring the voltages at the output of the regulator, and the radio started working on a power supply on which it did not previously work. A similar thing happened when troubleshooting a microphone a few weeks back--mic didn't work, started checking some voltages etc, did not actually change anything, then mic started working.?
So, cool, but I don't feel like I can trust that it's going to keep working reliably.
But I did put a homebrew heat sink on the regulator (just a strip of copper a few inches long). On this board, the regulator is very close to one of the toroids and in fact touched the toroid until I gently bent the regulator away from it a bit. But there's no way I could get the same kind of heat sink on it that the final transistors have unless I put some kind of riser between the main board and the Raduino to create space.?
I've had the radio running for several hours so far, and it hasn't blinked. Checked in to a 75m net in British Columbia last night (I'm in Seattle), too.?
It's not going to be my main Field Day rig but it seems I have a working radio for now so I'm happy :)
Thanks for the assist, as always.
Tim
