[Elecraft] K3 QSK

[Merv Schweigert]

Correct Ron,  and I hear none of the low freq thumping.  
As I mentioned I dont usually hear anything at all running
the AF/RF as I described in normal operation. 
I have no problems, but I can duplicate the problem others
are having with the RF gain wide open.
Merv KH7C
> Merv, KH7C wrote:
>
> I posted that I could not duplicate the thumps on #2603.  After trying a few
> more times I am hearing exactly what Mike describes, and after talking with
> Toby, it may be a difference in terminology, at least on my part.  I hear
> the same thing but I describe it as pops or clicks,  and as Mike says it
> seems to be from the high background noise, not that I have a high level of
> background noise, mine is S2,  but from the high level of the RF gain
> control...
>
> -----------------------------------------------  
>
> Certainly you can create higher-frequency "clicks" and other noises. That's
> a matter of turning up the gains so you have band noise (QRN) coming through
> the audio, then adjusting the keyer and TX timing so that only very short
> bursts of noise blast through between code elements. 
>
> That's perfectly normal in a QSK system. You are "hearing" in the very short
> interval between code elements. 
>
> That's not the low-frequency "thumping" that occurs in some QSK circuits by
> the transition from tx to rx. Typical "thumping" will be heard with the RF
> gain turned all the way down (to suppress the band noise) and sounds just
> like someone thumping of a big bass drum or hollow log. 
>
> Ron AC7AC
>
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