12BZ7 tubes

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

roblanger01-21-2009 4:03am

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.