In the Beginning....
There was the Rev - ST35 board.
Very similar to the Rev B, other than it did not have the 10 ohm cathode current measuring resistors.
My method was to simply adjust the "bias" pots so that the EL84 cathode socket pins (pin3) measured at
400 to 430 ohms relative to power/signal ground, andjust go with that.
There are not too many of these green boards in existence, I figured that it was time to share the pic.
/ed B