[Elecraft] K3 Rf gain tracking (main vs. sub)

Stan Gibbs stan at ajaxsoftware.com
Mon Oct 25 12:57:21 EDT 2010



Stan Gibbs wrote:
> 
> Thanks, Mike, I'll do the same measurement and see what it tells me. 
> Erratic behavior seems most likely due to a bad pot, but, as Sherlock
> would say, theorizing without data is a capital mistake.
> 
Sherlock was right; it wasn't the pot.  The behavior of the voltage on its
wiper is exactly what you would expect: a smooth transition from 0V to 4.7V
for the full travel of the knob from CCW to CW.

So, the question remains, what could cause the very non-linear behavior that
I observe with the audio and S meter?

This result also renews my curiosity about whether others have observed any
non-linearity around the 10 o'clock position of the RF gain when listening
to a test signal like an XG1?

-----
73, Stan - KR7C
-- 
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