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
@oldhvymec 

haha - fair enough...

btw - my car drinks a lot of fuel, what's the problem, anyone know?
Air filter, one of the worst offenders.

In a diesel/gas engine it will ruin a turbo and cause it to go through oil like a crazy too. Air filter.. yup...Under 100.00 usd on a HD diesel, 20-45.00 usd for a gas rig..

Second bad fuel filters (low fuel pressure)... Can cause the newer injectors to take a dump... they will leak (drip) or over fuel, and cause cylinder wash, again hi oil consumption, and a lot of premature ware, no lubrication...

Regards
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.