Now here's an interesting idea ... having a triode in front of the 6SJ7 with a TMB between the two ...
(Not Absolutely Minimum , but I guess we're not bothered with that any more
)
Referring to the words of our Fearless Leader ZP ... " You can also place the triode and a TMB tone stack in front of the pentode, since the triode has a very low anode impedance suitable for directly driving low-impedance tone stacks.This also helps overdrive the pentode more, so you can enjoy more of those nice rich chimey harmonics. "
Very interesting , and a bit more gain to play with !!!!!!!
DP, anxious to see the pic...