What is the approx life of a power tube? And, how can one tell if a tube is failing? Do they gradually lose their sharpness and sensitivity or do they go out like a light bulb -- or both? JNorth
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The sound changes quite a bit as a tube gets older. It's not quite like a light bulb. You would probably notice it and change it before the tube ever actually fails completely. As for life span I think its sort of random..... I think its a good while though. Depending on use I would say you could go on a set of tubes for maybe a year? Preamps its a lot better you don't have to change those very often at all.- Bottom
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Tubes have different "modes" of failure. They can wear out gradually and lose sound quality/clarity. They could start getting scratchy/staticky sounding. Or (rarely), a filament can burn out and the the tube goes dead like a light bulb.
How long they last depends on how hard they're driven. Preamp tubes tend to last longer than power tubes.- Bottom
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i have a tube preamp and i was not aware that tube sq degrades over time. that might explain why the telefunken i bought a while ago weren't that immediately impressive when i first installed them. it was only marginally better than sylvanias that it replaced.- Bottom
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Originally posted by Jnorth1178What is the approx life of a power tube?
Originally posted by Jnorth1178And, how can one tell if a tube is failing?Regards :T,
Boom....a.k.a...."The Box"- Bottom
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