Don’t forget the Shuguang WE6SN7 Plus. This is a fantastic current production tube. I use a pair in my Don Sachs DS2 and they are lovely.
6SN7GT VT231 TUBES
I love the old VT231 tubes!
The best sounding 6SN7GT ever...Sylvania, Raytheon, RCA, Ken Rad Etc. They may still be found, if you have $$$!! Where can I find true NOS VT231s? Any favorites that I missed?
(TS never made a VT231 - but their old black glass tubes with oval micas sound great!)