I have a new BitX40 that I am testing on the bench before building it into a case. Right now, it is all stock and I am just testing transmit audio to see how it might be improved. I can receive my signal on a nearby receiver if both are connected to antennas, and hear no distortion or carrier in the signal. In fact, it sounds pretty much like other BitX's I have spoken to on the air with little audio above 1700Hz. However, I cannot hear it at all if it is connected to a dummy load, which led me to measure current draws with the idea I could get an idea of power out with various mic options. I see 0.185amps on receive, and 0.40amp when the PTT is keyed...but it does NOT change when I speak into the mic, no matter how loud I am. I am already past the current draw suggested in the BitX alignment instructions...which I assume must refer to the unit without the Raduino. Should I be playing around with the RV136 in an attempt to see some change when the unit is modulated, or is something else wrong here?
=Vic=
Vic WA4THR