[GK] spends most of the time so far talking about the high voltage power supply design. For the particular tubes he had on hand he needed +200V, -400V, -550V, and 6.3VAC for the CRT heater.

There is a mains rectifier and filter, a pair of high-voltage power ... will also be a standby 5V supply using another small transformer, and a “power good” circuit to tell the motherboard ...