I in recent times bought my first tube amplifier?
Answers: I hope you have the schematic for it.
Tube amplifiers are glib to troubleshoot, but without schematic it would take very difficult.
Tube amps be all we have way vertebrae, I even designed and built my own in the 60's.
Telling you exactly what this could be, would be blowing hot nouns and that I don't do.
The symptoms mentioned could point to a bad electrolytic capacitor, sometimes you can spot them when you unscrew the thing up and see a deformed (they capture bigger) capacitor where some corrosive liquid has leak out.
It could also be a bad tube that have a shorted grid after a while, when it get s thaw. If you have the schematic you could scan and e-mail it to me, I could point out a few things where on earth to look for.
++ Additional hint :
Bad tubes can sometimes be detected by sensibly tapping a pencil against the cup, they might then fall through or start to function again, also tubes can become 'microphonic' which means the drumming of the pencil can be heard contained by the speakers.
If so, replace the tube. If you need tubes and can't find them e-mail me, I may know how to point out sources where to attain them.
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