Thanks to those who previously responded. I have nulled the carrier (not the
problem) and verified no hum pickup from the power supply.
Symptoms (with no mike connected):
1. Noise is dependent on mike gain. Disappears with mike gain below 8
o'clock position
2. Noise is present only in LSB. USB not a problem.
Is this an alignment problem? i.e. LSB too close to the carrier frequency?
BFO off?
tnx es 73 de John, WA5TWL
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