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Vintage threads from the first ten years

FeedBack and resonance pot squealing

10/28/1999 1:07 PM
Nils	FeedBack and resonance pot squealing Hi all, I'm back again with my monster Chieftain-clone. I've installed fixed bias and am now using 5881, then I wired for UL and a feedback line both switchable. The FB line has from opt: a switch 22k pot with a 2.2nF cap 8k2 resistor before the joining point at PI 390 ohms resistor to ground from PI. This squels like hell in regular setting, that is master on max and volume after taste and no UL when I lower the Master the squeling stops. And here's the fun part, in UL-mode it doesn't squeel at all. Can anyone advice, and if anyone's interested I can report from my UL-testing after this weekend. Nils

10/28/1999 1:07 PM

Nils

FeedBack and resonance pot squealing

Hi all,

I'm back again with my monster Chieftain-clone.
I've installed fixed bias and am now using 5881,
then I wired for UL and a feedback line both
switchable.
The FB line has from opt:
a switch
22k pot with a 2.2nF cap
8k2 resistor before the joining point at PI
390 ohms resistor to ground from PI.

This squels like hell in regular setting, that
is master on max and volume after taste and no UL
when I lower the Master the squeling stops.

And here's the fun part, in UL-mode it doesn't
squeel at all.
Can anyone advice, and if anyone's interested I
can report from my UL-testing after this weekend.

Nils