Probably based from the transformer; mine does the same thing.
Try tightening it down (the bolts) and it may help (will also help the sound *from* the amp too).
Otherwise if this doesn't work its probably the laminate in the transformer (the doping) - nothing can be done except replacement.
Someone else may have other advice...
Hope this helps!
Try tightening it down (the bolts) and it may help (will also help the sound *from* the amp too).
Otherwise if this doesn't work its probably the laminate in the transformer (the doping) - nothing can be done except replacement.
Someone else may have other advice...
Hope this helps!