As the principle designer of the K1, I just love these AGC circuitry
discussions, and thought I'd better put in my 2.5 cents.
The K1's present AGC circuit, being AF-derived, is a compromise between
attack time and recovery time. This topic has been the subject of
scholarly efforts by Haward,
I think what Ron and I were shooting for was not a really fast AGC but more
of a Not-so-gosh-darned slow AGC.
Wayne...doesn't 9 to 15 seconds for the S-meter to drop seems excessively
long to you? Especially for a QSK rig.
When I changed C31 from 2.2 to .22 the hang time seemed to approximate
Tom,
The selected part really is 2.2 uF, which provides a long enough AGC
hold time to prevent annoying leading-edge effects during slow CW copy.
If you mostly listen to much faster CW, you can certainly drop the
value.
In any case, the decay time will be roughly proportional to the
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