Ferroresonant transformers and 3278

[William Donzelli]

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:
>>>
>>>
>>>
>>> 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.