[Elecraft] K3 RF in SSB audio on 6M

[Don Wilhelm]

It is difficult to impossible to cure RF-in-the-shack at the transceiver 
end.
The most certain solution is to work on the antenna system.  Baluns at 
the antenna feedpoint and RF Chokes at the point where the feedline 
enters the shack are the most effective.
In other words, keep the RF inside the feedline where it belongs and 
prevent it from getting onto the outside of the coax.

For those with attic antennas (or otherwise quite close to the shack), 
the situation is difficult to cure because you can have direct radiation 
from the antenna in the shack, and the only cure I know for that is to 
reduce the power.

73,
Don W3FPR

On 10/8/2011 8:26 AM, Howard Sherer wrote:
> Only on 6M when I operate above 250W, I have RF getting into my SSB
> audio, using either the the R or F mic connector but slightly worse with
> the R mic connector. I have installed Fer chokes on the audio input
> lines with no improvement. Any suggestions.
>