New Tubes- Need Burn-In?

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.

I am a big-time Svetlana fan. a close second would be JJ (blue tube). Still, EH has lots of people who love them.

Well, 2 for Svetlana KT-88's thus far! Would that be the "SED" units?

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

You must differentiate between SED's and Svetlana's.

Present day Svetlana's are nothing more than Sovteks in disguise. The really good Svetlana tubes are now called SED and they are made in St Petersburg. The logo on the tube is a 'flying C'. The change over took place several years ago so before buying "Svetlana" tubes investigate.

I use, on different amps, SED KT88's, 6550's, and EL34's and highly recommend them for their tone and ruggedness (I've never had one fail, yet).

I give any power tube 48 hours or so of break in before making a final judgment.