Kentaja gives good advice. If you think the VT series is hard to bias you should try one of their older amps.
Audio Research VT200 Biasing Schematic ETC.
Since Audio Research Corp. will not provide a PCB schematic for the biasing of my VT200 behemoth I would request anyone with a circuit board scan and/or schematic to come forward. I hesitate to do this with merely their 2 page biasing instructions as I also know any tech, even at ARC, would rely on a detailed image of the printed circuit board, component values, test points and detailed procedure.
Thanks,
John
Thanks,
John