Thought the GT was rated as 300V (not 350V) maximum plate voltage.
Bigger difference than 350V.
There is an "old" production 6SN7 rated @ 450V, but I do not recall the "after" 6SN7 "letters".
Again, as mentioned, it depends upon the circuit design.
DeKay
Bigger difference than 350V.
There is an "old" production 6SN7 rated @ 450V, but I do not recall the "after" 6SN7 "letters".
Again, as mentioned, it depends upon the circuit design.
DeKay