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In Reply to: Re: eureka! posted by Vinnie on July 17, 2006 at 13:42:35:
Well, I don't know the circuit, but if there are 2 gain stages, say, then you could remove the tube(s) for the first gain stage, or disable it somehow, and see if the noise still happens. Of course, you need to check the circuit to make sure this won't cause any problems. This will eliminate either the first or second half of the circuit, depending on whether the noise is still there or not.Also, probably first, if you have a complete spare set of tubes, pop them in and see if the noise is still there. That will tell you if it is tube related.
Once you know the approximate area of the circuit that's causing the noise, sometimes you just have to remove components and test them (or just put a new one back in).
To see if it is power supply related, you might be able to power the circuit from a bench supply or something to test it.
These are all just ideas, and a lot depends on the circuit itself.
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Follow Ups
- Re: eureka! - ffrr 16:36:53 07/17/06 (1)
- Re: eureka! - Vinnie 17:19:51 07/17/06 (0)
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