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New Tubes- Need Burn-In?

Hey guys- a question.

I just put a new matched quad of Electro Harmonix KT-88EH in my Cayin A-88T Integrated. I properly biased the amp, and after a couple of hours of warm up there is still a touch of "glare" or hardness evident.

I know these brand new tubes need time to burn in...how long a wait is reasonable before I decide whether the EH tubes are the ticket or not? Any tips on what to expect?

Thanks!
danlib1
bojack
665 posts
 
I had a pair of EH EH-34s that never got rid of their glare, and from what I've read, that's not uncommon. My advice is to get the Svetlanas -- I did, and the problem was solved immediately w/no "break-in."
boa2's avatar
boa2
1,551 posts
 
Dan,
If in a day or two, the glare is still there, I'd switch to a different brand. The one word I would use to describe all of the EH tubes I've tried is glare-o-rama.
unclejeff
1,313 posts
 
I am a big-time Svetlana fan. a close second would be JJ (blue tube). Still, EH has lots of people who love them.
danlib1 OP
819 posts
 
Well, 2 for Svetlana KT-88's thus far! Would that be the "SED" units?
sogood51
2,157 posts
 
I installed new EH-KT88's in my Rogue amps (got them from Rogue)...they sounded good from the start, no glare at all?

Dave
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