[Info-vax] VAX 6000 on Young Sheldon

[Dennis Boone]

 > I was going to same the same thing.  Our VAX-6000 required a 3-phase
 > power source (measuring between any phase and neutral was 120v but
 > measuring between any of the phases was 208v).  It has been a long while
 > since I looked at the schematic but "I think" the 3-phase power supply
 > could be reconfigured to use single-phase 240v.

US centric:

An awful lot of minicomputer things, including a /780, have three phase
inputs, but those just go to an in-cabinet PDU, and all of the actual
internal power supply units are 120V devices on one of the phases.  The
system design tries to balance the internal load across the phases.
It's simple enough to run this sort of system from 120V power, though of
course you need a LOT of it.

I've an S/390 Multiprise system that claims to want _two_ three phase
inputs, but it's just terrifically redundant, and it will run just fine
on a single 208 (hot-hot-neutral-ground) circuit.  Complains loudly, but
runs.

De