28 Apr
2014
28 Apr
'14
2:24 p.m.
On Apr 28, 2014, at 1:55 PM, Eric Smith <spacewar at gmail.com> wrote:
On Sat, Apr 26, 2014 at 7:39 PM, Mark J. Blair
<nf6x at nf6x.net> wrote:
My plan for my 2065 at the moment is to replace the entire H761 with 3 modular
switching power supplies. 2 to supply the 10 -5.2v supplies and 1 to supply the
4 -2v supplies. All told they'll draw ~2200W which is a far cry from what the H761
draws.
TTFN - Guy
So, for a computer that normally takes 3-phase power but actually just has
single-phase loads internally (i.e., it's made to take 3-phase power since
that's what's available in industrial/commercial buildings, but nothing in
the machine actually requires 3-phase power), I think that a single-phase
conversion might be preferable to using a rotary phase converter.
The US model KL10 contains many single-phase 120V loads, but the ECL power
supply front end (H760) actually uses three-phase, with three ferroresonant
transformers and a three-phase bridge rectifier to provide 12.6V at 500A.
In principle that could be replaced by some other 12V 500A power supply,
but if you're going to do that I think you'd want to go further and replace
the H761 linear regulators or the entire H761.