My pre and power amps all have standby switches that provide a much reduced current to the tube filament, thus avoiding thermo shock when powering up from cold.
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.