6SN7 suffixes

I'm using 6SN7's in my Atma-sphere equipment. I was curios about the multitude of letter suffixes that follow the 6SN7 tube type.

fatparrot02-11-2005 7:42pm

eldartford Details Discussions Posts This discussion Message User 4,262 posts 02-12-2005 at 06:17pm Copy Comment URL Report Comment Edit Delete Early 6SN7 had metal cases. the GT means "Glass Tube".