Hi John,
I'm curious to know if the problem was ever resolved. As of yesterday my 10 year old 7000 just began having faint scratchy audio when I transmit on HF SSB, CW, and RTTY mode (more like a frying hiss) coming from the speaker, internal or external. The symptom goes away if I reduce the output power to around 50% or lower.? AM is OK, but I suspect the lower output doesn't trigger the noise.? No problem on VHF or UHF. ? For those who will comment... the faint scratchy audio and/or noise, depending on transmit mode, is there all the time, antenna or dummy load.? It's not RFI.? Ground is good, mic doesn't need to even be plugged in for it to happen on CW when keyed.
-Marty
N6PRX
Marty - N6PRX