[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.

In this case, the high voltages will eventually be used for electrophoresis ... and a much higher voltage output, though, take a look at this power supply which tops its output voltage around ...