I love the Tung-sol 6NS7 I use them in my Triangle Arts I've owned the older version & his newer line. Pre Amp & Mono-Blocks. They're inexpensive balanced & sound great. When I compare the difference in prices I'll go with Tung-Sol's. More money for vinyl.....
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!)