IMHO the best 6SN7s are the US made brands from the 1940s. Euro tubes just dont' compare. Not only that, they are really not the same tube... ECC32, 34 are not equal to 6SN7, CV1988 is. Neither is 5962, to some degree. (275v rating vs. 300 or 450 for 6SN7GT/GTA-B.) Whether they will work ok or not depends on the circuit - check with Victor K.
Favorite 6SN7s: Tung Sol black glass, Sylv. tall boy and VT-231, National Union, Ken-Rad, Sylv. 6SN7W.
Favorite 6V6: coated-glass versions from KenRad, Tung Sol, Sylv., some RCAs, National Union.
YMMV,
-Ed
Favorite 6SN7s: Tung Sol black glass, Sylv. tall boy and VT-231, National Union, Ken-Rad, Sylv. 6SN7W.
Favorite 6V6: coated-glass versions from KenRad, Tung Sol, Sylv., some RCAs, National Union.
YMMV,
-Ed