Larry,
This quad that I have in the 11A now for about two hours is half of the set of eight which I ran in my Premier 140 for about three weeks earlier this year. They probably had about 125 hours on them and were decently broken in.
I find, though, that even tubes with hundreds of hours on them need a few days to “settle-in” after they been on the shelf before they sound their best. I have to say that initial impressions in the 11A are quite positive and considering that they’re following some Stromberg-Carlson labeled Tung-Sol 6550 solid gray plates, I think that speaks highly of them. They seem to combine the richness and timbre of a KT-88 with the detail of a 6550. Not exactly to the last degree of either, but a good blending of the two.
I appreciate your sharing your experience with me.
Regards,
Joe
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