I was reporting on the ferroresonants, and nothing else. -- Will
On Thu, Dec 31, 2015 at 7:33 AM, Paul Berger <phb....@gmail.com> wrote: > On 2015-12-31 7:17 AM, Mike Ross wrote: >> >> On Jan 1, 2016 12:05 AM, "jwsmobile" <j...@jwsss.com> wrote: >>> >>> >>> >>> On 12/30/2015 11:45 PM, Mike Ross wrote: >>>> >>>> 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 >> >> out of them. Any reason the power has to be in phase? >>> >>> 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 > > 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.
