Audio AGC pop

[Tom Cooper]

The audio derived AGC in the older T-T radios has always bugged me,
but I have never had much success in getting rid of the "pop".

Replacing the 4.7 mfd AGC electrolytic cap with a tantalum cap does
improve things.  W3TS built a little MC1350 based, RF derived AGC
voltage generator for his Corsair II, but the one I built works like 
many of my RF projects (either not at all or self oscillation).

I am experimenting with an Analog Devices SSM2165 compressor/limiter 
just before the AF gain pot and it helps, but there is still a "peck" 
on strong CW signals.  I guess I should just live with it since my 
ears are better protected, but it's irritating, like having a small 
stone in my sock.

Does anyone else have any suggestions? 

Tom W1EAT


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