[Elecraft] [K3] Tone on 21.017

[David Gilbert]

I can't say for sure about 21017, but several of the K3 birdies tune in 
"reverse".  And the subreceiver seems to be much better shielded than 
the main receiver.  The birdies in the subsreceiver are much weaker and 
many of those heard in the main receiver are not detectable in the 
subreceiver.

In any case, it seems you have nothing to lose by performing the birdie 
removal process on 21017.  If it goes away you know it was a birdie.

73,
Dave   AB7E


tom_k1tl wrote:
> Hi Gang,
>
> For some unknown reason, I have a tone around 21.017 on the K3. Don't know 
> when it happened but just was on 15m (yea, the band finally opened to EU) 
> and heard the tone. I thought that it was a "birdie" but it is "reverse" of 
> signals on the band. This morning I had the tone again and went thru the 
> filters and noticed that it stopped when it was above 2.2KHz. I have 6KHz, 
> 2.7KHz, 2.1KHz and 400Hz filters installed in the main. Only 2.7KHz in the 
> sub and cannot hear it there.
>
> Is it possible that I have a "bad" 2.1KHz filter??
>
> HELP !
>
> Tom/k1tl... 
>
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