It only takes max 5 min for tubes to go into operational heat. Other stories about warming up for hours are just unnecessary hype for unaware and uneducated consumer -- so do your figures.
||Just don't use them and it will last forever||
isn't true at all, because your DC caps will likely dry out and fail often destroying tubes as well.
||Just don't use them and it will last forever||
isn't true at all, because your DC caps will likely dry out and fail often destroying tubes as well.