Dear Al,
Just for giggles.?? unplug your GPS module and see if that changes anything.?? Also put some .01MFD and .001 Capacitors on the input and output side of your 5 V DC regulator card.
Check the solder connections on the inductor on the final amplifier.?? That may have a resistive component that is causing the power to fluctuate.? Also resolder? the ground end of the bypass
capacitors (.1) around the U3S board.?? It may be a bypass issue somewhere on the board.?
Good luck.?? You will find it.??
73 Dave WA5DJJ
