Yamaha (Soldano) noise problem

rmcfee

New member
I have a problem with my Yamaha T100C combo which was designed by Michael Soldano.
There is a low crackling noise happening that does NOT change volume when I adjust the master. It happens on the clean or dirty channel.
I have changed the tubes one at a time (pre and power) and the noise does not go away.
Could it be a bad capacitor (filtar caps?) or resistor or something?
It is loudest when flipping on the standby switch and then it drops to an annoying background. Thanks for any advice at all. - Rob
 
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