[Elecraft] K2 RF Feedback

[Stewart Baker]

Given a few hours free I decided to investigate a problem with RF feedback that 
I had been getting with my K2.
Occasionally on 80m I had received reports that the TX audio was not 100% and 
after backing everything off, things improved. It was only when I noticed that 
on 40m I could provoke the RF feedback that I have gotten around to doing 
something.
After checking the mic leads etc I decided that the RF was getting into the 
input of the speech amp/compressor IC.
The cure was to fit a 1mH RF choke (out of the junk box) in series with C32. 
This provided an immediate and complete cure. Hope this helps someone.

73
Stewart G3RXQ