There's no need for tube amp to be on 24/7. 5min is all it takes for the tube to be in stable offset and the 'best of sound' will 'show up' in another 5min.
When I had one after turning it on I'd go to kitchen make some tea or blend some bloody mery, pack a blunt or bowl, load record or CD and than listen.
When I had one after turning it on I'd go to kitchen make some tea or blend some bloody mery, pack a blunt or bowl, load record or CD and than listen.