Fender pro reverb AA1069 nasty noise on normal channel - Page 2 - diyAudio
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Old 4th June 2013, 10:31 PM   #11
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Join Date: Jul 2012
I think that I need to remove the board and replace every single component on it and put it back all lemony fresh, what do you say?
Its a lot of work, but I cant waist more time with it, the way it is now I cant understand what the problem is.
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Old 5th June 2013, 03:26 AM   #12
Enzo is offline Enzo  United States
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Location: Lansing, Michigan
And if it is not a part that is bad?

You cleaned and baked your board, but did you test it for stray voltage?

Ground your meter, power up the amp. With your red meter probe, push the point into the fiber board right NEAR an eyelet that has high voltage. For example right nest to the eyelet for any of the 100k plate resistors. In fact, since you have isolated the problem to only certain sections of the amp, just visit every eyelet in that part, poking the meter right next to an eyelet but not touching it. You should get zero volts, if you find any DC voltage by just p[robing the fiber board, your board is still contaminated. it takes longer for me to describe it than for you to try it.
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Old 20th June 2013, 06:32 PM   #13
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Hi to all.
First I want say thanks to everyone that got involved in the subject in one way or another. Thanks for you opinions, suggestions and everything else, especially for your time, really appreciated.

Just a short summary of my findings and the solution for the noise that was coming from the normal channel.

Simply replace the 1st valve socket, yes thats all.
Really odd because I did clean the contacts of the old one, all of them to be frank and that didn't work.
Thanks once again.

Problem solved
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