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RE: Sylvania 6sn7 gtb

I've got some GTA's that are circa 1972 as I recall, and they are not bad sounding tubes at all. Their sins are ones of omission. They do not do anything badly, but not exactly stars in any particular area of performance either. I used them as drivers in a hybrid amp. I have never used them in a preamp, so cant really comment on them in that application. All in all I'd count them, as I used them, in the livable camp.

Edit: Just to add that I much preferred these GTA's in my application to the EH 6SN7, which hit the scene about the same time I got hold of these GTA's. The EH's are a good garden-variety 6SN7, but thought the Syl GTA much easier to live with. To be fair though, my absolute favorite, and the tube that occupied the slot longer than any other is the NU gray glass. Sadly, that tube has gone all but extinct these days.


Edits: 09/25/14
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