[HAM] B3 Swell Capacitor

[David Anderson]

Yes, checking the 12AX7 is a good idea--so good, in fact, that I  
suggested it yesterday ;-)

David A.

On Feb 10, 2008, at 2:06 PM, Scott Hawthorn wrote:

> I was gonna post a followup and add something about the 12AX7, so  
> I'm glad
> you did, Pete. I completely agree. That particular tube is an  
> integral part
> of the expression control circuit and is very much subject to  
> noise. If
> this were my problem, I would also be pulling that tube and  
> cleaning up the
> pins and socket. I repeat my opinion that when the pedal comes to  
> full, the
> slight banging of doing that can cause a vibration that can be  
> picked up
> anywhere in that circuit.