Quote:
Originally Posted by
slainbabyyc
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i'm gonna chime in with something i saw in a repair video on youtube: on old fender amps, the circuit board itself can become conductive as grime accumulates over the ages. this can cause a whole host of problems and it's probably not something any of your techs took the time to properly address. they can test the board to see if it's conducting at various points, and then fix it by desoldering the components in the problem areas and properly cleaning it
here's the vid
GREAT CHANNEL !!!
I've been watching his stuff for a couple of years now.
Getting technical it's s not a circuit board, it's known as turret or tag board which simply has the electronic parts connected directly to each other on posts, no printed circuit on the board ( no PC board).
Yes, this board is something that can sometimes fail after many decades but there are many many other things as well that can be responsible for an old amp being noisy.
Unfortunately many techs try to fix only the most obvious problems in an amp, either to keep the cost of the repairs down (making everything truly proper in a fifty or sixty year old amp is quite time consuming and costly) or it's because they simply aren't great techs and miss stuff.
If you watch Lyle (Psionic Audio) and understand even a little about electronics you get just how knowledgeable and thorough he is. He is exactly the kind of tech we hope we have working on our amp but unfortunately that often isn't the case.