new tube break in

hi guys,
what is the usual break in period for new tubes for a amp?i have quicksilver v 4`s and i am looking for new kt 88`s
thanks
al

alpass12-21-2005 1:52pm

tfkaudio Details Discussions Posts This discussion Message User 591 posts 12-21-2005 at 10:39pm Copy Comment URL Report Comment Edit Delete About an hour. I have yet to notice a break-in difference with KT88's or 6550's. Input tubes are another story... Cheers.