Vacuum Tube Break-in

i believe there is some break in, depends on the tube, its age/history, whether it has been burned in... takes em a good couple hours, to overnight, to fully reach their peak performance, in my personal experience

i have alot of older tubes collected in the 80-90-00’s, when i tube roll, the first 30-60 minutes are certainly not indicative of how they will sound

there is always the conundrum with break-in/burn-in

is the gear or item burning in, or are we as listeners getting more accustomed to the sound over time, being exposed to it repeatedly? - we all hear our systems sounding different day to day, each time we turn it on... what we sense can vary, conditions can also change

age old question this is...

my sense of this, regarding tubes, is that for most well functioning tubes, they do take some time (in my view an hour to a day, or overnight) for their sound to stabilize, after that, our ears are also getting acclimatized, sometimes in a good way, sometimes not