The NPN's powered from the "TX" 12v rail do not get power unless the PTT switch is pressed to transmit.
I suggest you concentrate on the receiver first.
When checking out the transmitter, no need to apply power to the IRF510 ?until everything else is working.
Should be able to hear a 40m transmission from just the Q14 driver, using?a nearby shortwave receiver.
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On Sun, Jun 11, 2017 at 01:30 pm, Jerry Gaffke wrote:
Raj's advice to check the base-emitter voltage across all those NPN transistors is a good one,
just unplug the Raduino and look for around 0.7 volts on each NPN with a DC voltmeter.
?
