31 Dec
2015
31 Dec
'15
5:36 a.m.
I was reporting on the ferroresonants, and nothing else.
--
Will
On Thu, Dec 31, 2015 at 7:33 AM, Paul Berger <phb.hfx at gmail.com> wrote:
On 2015-12-31 7:17 AM, Mike Ross wrote:
On Jan 1, 2016 12:05 AM, "jwsmobile" <jws at jwsss.com> wrote:
All of those IBM machines you listed will have resonant capacitors in the
power supplies, and all have at least one synchronous motor inside, not to
mention all of the AC fans inside the machines.
Paul.
On 12/30/2015 11:45 PM, Mike Ross wrote:
out of them. Any reason the power has to be in phase?
Thanks for the thought... my main concern is the System/3s and Henk
Stegeman - who has forgotten more than most of us will ever know about
S/3! - says that 60Hz S/3 on 50Hz power is a no-go. Different voltage,
fine - transformer can be restrapped. Different frequency... trouble!
And then there are rotary machines of course. I bet you half my disks
drives need the right frequency or a spindle pulley change.. and even
then *they* probably have ferroresonants in their power...
Mike
Order a boatload of 8kw honda generators? I think you could get 40 amps
I know for the mainframe power that might not be high enough, but on
smaller machines it would take care of the problem.
thanks
JIm
Jim most of my 'interesting' machines - both S/3s, S/38, 1800, big disk
drives - do need three phase 60Hz. The 2741s, 3741, 5496, S/32, S/34, &
S/36 are single phase but almost certainly need 60Hz for power supplies
and/or disk drives
On the plus side all of the stuff I brought over from the UK will work
fine
- includes pdp-15s, pdp-12s, KL & KS 10, and a bunch of RK05s with 50Hz
pulleys! They all take 240V 50Hz.
Mike