1. I'm curious about trying some adapters for the mini-Torii to use 6CG7 in place of the 12AU7s.
Found this online, and would like some input, sounds like adapters and just drop it in, the "if" is the 2nd quote :
Quote:"correct on the 5814 black plate but you know what would be the best idea and I kid you not? This has worked superbly on very Mac amp I have done and even my high power stromberg carlson theater amps.What you do is move the filament wires to 4 and 5 and sub in a 6cg7..The difference is one you will thank yourself for and its a direct replacement and its much more linear and you will lower THD by 2 tenths plus.Just move the fil wires.You can thank Pak protector for this as he was on me for 2 years to do this and I have never looked back.
If the power supply waveform isn't pretty,neither is the sound in most cases."
Quote:"If your 6.3 volt transformer winding can handle the additional load, a 12BH7 makes a fine substitute for the 12AU7. Otherwise, try a 5814 as others have suggestedU7."
2.
I'd also like to hear if the extra heater current for the E80CC (2x filament current) or 12BH7 excludes them from use in the torii.Has the circuit been specifically optimized for the 12AU7? With no room for the 2x filament current draw, if so it would seem that the 5814 or possible the adapter for 6CG7 would be the path to explore. It's amazing how much discussion there is online about how non-linear the 12AU7 is.