braintheory
Well-known member
So I got recently these vintage GEC KT88 TT21's (which weren't cheap lol) and I bought these adapter sockets for them since one of the connections for these is at the top cap (pics of the sockets and tubes down below to clarify). I wanted to check first with the more tech savvy guys on here if it is safe run these tubes using those adapter sockets in my KT88 powered amps and if they'd need to be biased to different numbers than I'd normally do with my KT88's or 6550's. I know these tubes are more esoteric, so any help would be much appreciated. I just don't wanna damage my amps or tubes. I asked the builder himself of one of my KT88 amps about these tubes and he unfortunately seemed to wanna avoid going there and just said he doesn't know and to advance at my own risk
