After 10 days with my K3 I am still learning and still smiling.
I was getting reports of mild to severe RF on my SSB audio. Since I was having trouble with my old MC-60 mic, I assumed it was the cause. Not so.
I have an old brute force power supply. I use an open-wire fed antenna connected to a balun in the shack. When I monitored the voltage reaching the rig, the reported level varied wildly when in transmit mode. Putting a fat ferrite toroid choke on the power cord has solved the problem.
FWIW.
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