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In Reply to: Oops...time to change that tube posted by Byrd69 on June 25, 2023 at 16:25:19:
A lot depends on how much you use them, and how hard the gear pushed the tubes. I've worn out some tubes, both power and small signal, over the years back when I was listening on average 6+ hours a day. They tend to lose their sparkle, get kind of dull sounding. I've had this happen with 300Bs and 2A3s as well as small signal tubes. As far as actual failures, not often. I had a 6SN7 arc on me, and a couple of VT-25s that were gassy. That's about it.
Jack
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