[TenTec] Omni6/Omni6+ AGC pop on cw leading edge

[Barry N1EU]

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 at 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