Draw a 1k6 load line on an 813 with 30% U-L, and B+ of 650-700V. Idle at ~140 mA and I am off to the races with this pair of Iron. I am figuring about 75W or so and being Class A all the way. I have some special power Iron on the boards with Heyboer. Half an amp DC from 500 to 700V with a few stops in the middle.

None of this Class A to Max-Power/N( with N being an integer larger than 1 ), and Class AB1 at Max-Power pile of Marketing beefalo-chipz....:)

I am first getting a kit from Jim so I can resurrect the amp and listen to it. Got a few pairs of Tektronix matched 12BY7A's in the stash to try on that one.