Well the fact that the Clean Volume has absolutely no affect on the noise points to the noise being 'after' the volume control.
So from the entrance to the OC to the beginning of the power amp you have a problem.
To be honest, I cannot help all that much as I would use my Oscope to find the source of the noise.
Thinking beyond that thought, you may be able to 'see' the noise with a volt meter.
It may show itself as an erratic DC voltage , where it should be steady.
Or it could be seen as an erratic AC voltage riding on the signal.
There are a number of Jfets that are used to switch in & out certain parts of circuits whether the amp is set on clean or gain.
Truthfully, I do not believe that you are setup for the level of troubleshooting that is called for on this problem.
You know the problem with the amp.
That is the information that a tech needs.
"What's wrong".
So, my kindly advise is to take it to a competent tech & let them have at it.
So from the entrance to the OC to the beginning of the power amp you have a problem.
To be honest, I cannot help all that much as I would use my Oscope to find the source of the noise.
Thinking beyond that thought, you may be able to 'see' the noise with a volt meter.
It may show itself as an erratic DC voltage , where it should be steady.
Or it could be seen as an erratic AC voltage riding on the signal.
There are a number of Jfets that are used to switch in & out certain parts of circuits whether the amp is set on clean or gain.
Truthfully, I do not believe that you are setup for the level of troubleshooting that is called for on this problem.
You know the problem with the amp.
That is the information that a tech needs.
"What's wrong".
So, my kindly advise is to take it to a competent tech & let them have at it.
Comment