Is it possible that I'm seeing AGC popping because the capacitors are aging?
I'm thinking of replacing the 14-year old 3.3uF electrolytic AGC
timing capacitor with a new tantalum capacitor of equal or slightly
smaller value. Comments?
Tnx/73, Barry N1EU
On Sun, Dec 11, 2011 at 4:00 PM, Barry N1EU <barry.n1eu@gmail.com> wrote:
> I notice up to a +10dB pop on the leading edge of cw elements with my
> Omni 6+. Please see a recorded waveform at
>
> http://n1eu.com/omni6agc.gif
>
> and the accompanying 20sec recording is at
>
> http://n1eu.com/omni6agc.wav
>
> It's clear that when there's been no signal for a second or so, the
> big 10dB pop is much more likely. Otherwise there's a "little" pop of
> 3-5dB. I'm not seeing much in the archives but has anyone tried to
> tame the "pop" via AGC time constants etc? Can anyone contribute a
> little technical analysis?
>
> I see little difference in the popping with fast vs slow AGC.
>
> Thanks & 73,
> Barry N1EU
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