Mike I used an LM2596 dc to dc converter to drop the 13.8 vdc from P1 to 5vdc It¡¯s rated to 3a. I use it to feed my TDA 2030a audio amp, my SSM 2167 mic preamp/compressor and theRaduino ?board.
I bent the raduino1 pin 4 up so it doesn¡¯t set into the socket thus isolating the 13.8 supply from the raduino board.
seems to work well. I did put a choke on the 5vdc output wire and I don¡¯t have a problem with RF noise.
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73
Mick VA3EPM
Mick