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Hi, this is maybe slightly off topic...my tube amp is starting to make a
slightly metallic or glassy sounding rattle on certain notes (the A string
will usually do it, or if I fret a B on the 14th fret, A string). I pushed
an unsharpened pencil against the first power tube and it seemed to stop.
But it will also stop if I push my palm against the back panel. I also
tightened every screw I could find on and in the thing. Some of them were
very loose. But it still might be that tube. Any suggestions? Is this what
happens when tubes go bad? Can I just buy one power tube and replace it?
Thanks,
Tube Novice,
BN
