[sorenj07]

How does it look? I have the Z565's, PA774, and the tubes. I'm also considering using a single 6EM7 per channel, the high gain half direct-coupled to a concertina formed by the low gain/low Ra half, Williamson style.




I've got 8 Russian 6F6G types on hand, but am prepared to try new production 6V6's as well..

It's been suggested that I incorporate some 6SN7's as CF's direct coupled to the 6F6's, as the 6SL7's are a bit wimpy in the current department.  I'm exploring that option at the moment as well. 

[JoshK]

If it were me, I'd put a CCS in the tail of the LTP if you go with the topology shown in the schematic. 

[sorenj07]

That has been suggested as well, and would probably be very easy to implement. It'd let me use perfectly balanced plate resistors, right?

[JoshK]

That has been suggested as well, and would probably be very easy to implement. It'd let me use perfectly balanced plate resistors, right?

Yep.