Preamp tubes last for years,as a matter of fact I have antique radios that are over seventy years old with the original tubes and they are fine. Power amp tubes are more apt to wear out so I would not keep them on. Don't worry about it just enjoy it.
How can do you extend the life of your tubes?
My amp premp and cdp are tubes. I read years ago, proportionatley, the most tube wears comes from powering up. And shutting down, and then powering up shortly is life shortener for sure. Shortly is too vauge. What do you tubers do to lenghten the life of your tubes, especially when we're talkng NOS and the like? thanks in advance.