[Elecraft] K3: 6M SSB audio hash

[James C. Hall, MD]

Hello:

 

I've noticed some audio hash on my SSB signal on 6M only when the PA relay
kicks in at 13 watts. My long microphone cable goes to a Multi-Switcher ->
W2IHY Noise Gate/Equalizer -> Heil Goldline microphone. This completely
disappears when I use a Kenwood hand mike direct to the K3. Thinking that
this was a classic "RF on the line" problem, I clipped on multiple ferrite
chokes with many turns on the cable coming from the K3, the Goldline mike,
and in between the switcher on noise gate. This didn't even slow it down !
Hmmm. Interestingly when the PA relay is off at 8 watts, there is absolutely
no hash.

 

For now, I'll just use the hand mike on 6M (which requires a bit more mike
gain) to keep a clean signal. Has anyone else noticed this ? Got a solution
?

 

73, Jamie

WB4YDL