Power Amp

FIRST. Who makes the amp? Go from there. Certainly a problem.
Power valves look a little brighter than usual?

You only get so many "turn on", with a valve. The way it’s heated up has a lot to do with tube life too. The slower they come up the longer they last.

Roberjerman said, they have to be bias correctly. They aren’t..
They are bias to hot for sure (over 50 EL34s 4 months is a push)

Dynaco ST 70 come to mind, if the bias circuit hasn’t been upgraded, they will gobble up power valves...Fixed a few of those..25-30 years ago.. Mc 275, can have a small valve that will cause red plating also.. Ideas, ay..

Regards

why do people come here asking for help -- while themselves not providing remotely enough info so that other people here with knowledge can give a useful answer???

Start to look for a SS amp and problem solved!

jjss491,129 posts10-21-2020 1:06pmwhy do people come here asking for help -- while themselves not providing remotely enough info so that other people here with knowledge can give a useful answer???

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The useful answer is another question. Who makes the amp? Just saying. Bad enough the thing is gobbling valves. AY? Really need to hone those mind reading skills. Me I'm a retired mechanic... Top of my game when it comes to that, stuff, reading minds... :-)

Regards

@oldhvymec 

haha - fair enough...

btw - my car drinks a lot of fuel, what's the problem, anyone know?