Here are 3D models for the driver board of my future 120 watt monoblocks. They were created with the latest beta version of Novarm's Diptrace which supports 3D circuit board view.
Here is the top:
The bottom:
It features two 6SN7s and a long tail phase splitter with a CCS. I can easily downgrade the board to drive two tubes for 60 watts if some of you want a 6SN7 board for a MK3.
The board is designed to fit the footprint of a MKIII. The bias is controlled from the board, one control per tube, so the bias pot on the chassis will not be used if this board is used.
All that is left is to send the boards out for manufacture at Gold Phoenix, then to build the unit.
Here is a link to the schematic:
http://img508.imageshack.us/img508/2567/drivery.jpg
What do you all think?