rule of thumb: how long do you leave a tube preamp on versus turning it off then back on?


I just upgraded to an Audio Research REF 10 with 12 tubes and I am wondering how to best preserve the tubes. How long sitting turned on is equal to the wear and tear of turning it off then on again? I had a Rogue RP 7 with just four tubes so I didn't worry about this issue so much, I just turned it on when I began to listen then off at the end of the evening. Now I'm wondering where the sweet spot is? Away for a hour, two, three, turn it off when? Am I over-thinking this issue?
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Showing 1 response by hilde45

I don’t think a question about preserving the tubes is neurotic at all. It’s a simple question which aims at good habits to preserve a resource.

Without over-thinking it, the better you match your listening time with the time the tubes are on, the longer they’ll last. That will give you the confidence to spend more on better tubes, rather than changing them out more often. If you find that estimating this is a pain, then just turn them on and forget the conservation thing; you'll get more pleasure that way.