Feedback in reverb Circuit

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eddiejg
Senior tube assistant
Posts: 211
(2/1/04 11:30 am)
 Feedback in reverb Circuit
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 I just 'finished' a SE amp with reverb & it has issues.
I think I need to shield some input wires because I'm getting some buzzy distortion when the gain is turned up.
The problem I have with the reverb circuit is that when I turn the 100k reverb pot more than 1/4, it starts to feedback.
It uses the same component values as the AA1164 reverb circuit.
I'm going to shield these input wires also as this is the only thing I can think of on my own (being my 1st reverb build).
In the meantime, if anyone else has any suggestions, they're welcome.
Thanks.
-Ed
 
eddiejg
Senior tube assistant
Posts: 212
(2/3/04 11:04 pm)
 Feedback in reverb Circuit
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 Rewired preamp & reverb circuits & changed some component values & it's now a useful member of society.
The reverb is still a little over the top, I wouldn't set the pot past about 1/4 for normal use.
What would be the best way to tone it down?
Lower the pot value to 50K?
Adjust the mixing resistor from 2.2M to ??
Raise the 470K resistor from the reverb return amp to 1M?
Or?
Thanks for any suggestions.
-Ed
 
 
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