2. amps-preamps
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Tube Failure

Lost a 6550 tube when I turned off my amp. 2 Days ago, on turn off, I got a moderate 'pop' from left speaker. No big deal, but new. Yesterday, after operating all day with out incident, when turned off I got a loud pop. Turned amp back on - no sound. I found there was a tube in the left channel which had failed, replaced it, now amp is back to normal.

In the past I've had all kinds of tube failures but never one on turn off. Any thoughts?
newbee

Showing 1 response by daveyf

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daveyf
2,835 posts
 
Seems like it was a minor issue. Agree it is strange that the tube would blow upon turn off and not turn on...but you did state that it had an issue on prior turn on.
Wonder how often a driver tube blows before a power tube? Has anyone actually had a driver ( small signal) tube blow on them?
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