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Power Amp

My power amp keeps burning up the power tubes.  I get maybe 4 months out of them  . I have use three different type of tubes that are recommended for the amp. Can anyone help, why this is happening, are all of the power tubes bad?
128x128mcallij1
jond's avatar
jond
5,780 posts
 
You should check your line voltage if its running high that could take out tubes sooner. If you change your lightbulbs frequently that's a good indicator.
aewarren
643 posts
 
Turn it off when you're not listening to it.
bigkidz
3,381 posts
 
you can measure the voltage to the tube  sounds like a bias issue 
gs5556
1,234 posts
 
Heater voltage too high.
curiousjim's avatar
curiousjim
4,678 posts
 
Do you turn the amp off when you’re not listening?  Power tubes should last at least  1000-2000 hours depending on type and usage . 

All the best.

JD
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