12BZ7 tubes

What brand of 12BZ7 tubes are used in Cary/AES amps?

roblanger01-21-2009 4:03am

jalapenos Details Discussions Posts This discussion Message User 81 posts 01-21-2009 at 05:37pm Copy Comment URL Report Comment Edit Delete My Sixpacs came with RCA blackplates. From what i understand, RCA and GE are the best of the 12bz7.
roblanger OP Details Discussions Posts This discussion Message User 117 posts 01-22-2009 at 02:20am Copy Comment URL Report Comment Edit Delete Not sure what I have. The tubes are marked with "12BZ7" in gray near the top of the glass but there's no indication of manufacturer.