11 Mar
2023
11 Mar
'23
5:40 a.m.
On 3/10/23 17:42, Paul Koning via cctalk wrote:
CDC 6000 series is the one I know of. But they'd
also use either 1 or 3 phase regular 50/60 Hz power. For example, the console display
uses 3 phase 400 Hz for its power supplies (nice for low ripple) and 60 Hz 110 V for fans.
The CPU cabinet takes 400 Hz power to run its power supplies but 60 Hz power for the
compressors that cool the Freon that cools the logic.
I believe some of the tape drives used 208V 60Hz single-phase. I'm
pretty sure the big disk drives (e.g. 808) had 3-phase spindle motors
powered from the 240V feed. I'd have to check, however. 400Hz for the
logic. I don't recall what the Bryant 4000 drives used, but I"m sure
that bitsavers can tell you.
--Chuck