] On
Behalf Of John Eells
Sent: Wednesday, July 29, 2015 11:51 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: 1403 at 60Hz
t...@vse2pdf.com (Tony Thigpen) wrote:
Talked to a guy that has done several of these conversions in years
past. This is what he said:
snip
The only motor in the 1403 ran a hydraulic
g...@ugcs.caltech.edu (glen herrmannsfeldt) wrote:
snip
https://ia601603.us.archive.org/35/items/bitsavers_ibm140xSY2nd3MaintManualDec71_21919776/SY24-3395-3_1403_Models_N1_and_3_Maint_Manual_Dec71.pdf
See page 31 (or 1-26).
Induction motors run slightly slower (they aren't perfectly
Talked to a guy that has done several of these conversions in years
past. This is what he said:
The DC to the hammers comes from the controller, not the 1403. So, not
an issue.
The only motor in the 1403 ran a hydraulic pump. Should be able to just
replace the motor with a current
t...@vse2pdf.com (Tony Thigpen) wrote:
Talked to a guy that has done several of these conversions in years
past. This is what he said:
snip
The only motor in the 1403 ran a hydraulic pump. Should be able to just
replace the motor with a current off-the-shelf motor as speed is not
critical.
(snip, I wrote)
From one 1403 manual, I see some gears that are specified for 50Hz
and for 60Hz, but I am not sure what they do. As far as I can tell,
the train is powered by a synchronous motor (or close enough).
I presume you don't want the train running 1.2 times as fast.
(snip, John
Merrill
Sent: Wednesday, July 29, 2015 2:08 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: 1403 at 60Hz
Most old pre-solid-state aircraft electronics also used 415 Hz because
transformers are much lighter at higher frequency.
Barry Merrill, EI/W5GN (where I use 14MHZ!)
Herbert W. “Barry” Merrill
g...@ugcs.caltech.edu (glen herrmannsfeldt) wrote:
(snip, someone wrote)
I don't know power consuption, but nowadays it's not hard
to get semiconductor-based power supply which generater 60Hz
or 50Hz or any value you want (within some range).
(snip, someone else wrote)
(sorry for losing the
(snip, someone wrote)
I don't know power consuption, but nowadays it's not hard
to get semiconductor-based power supply which generater 60Hz
or 50Hz or any value you want (within some range).
(snip, someone else wrote)
(sorry for losing the attributions, I am copying from usenet)
I suppose
As I understood it at the time, larger S/360 and S/370 also
used motor-generator power supplies, though I don't know the
output frequency. The higher frequency means less filtering.
Generally 415 Hz. Why this odd number is beyond me. The Hitachi clones
also used 415 Hz.
But yes, you can run
http://www.mxg.com/mxg-l_listserver/
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of William Donzelli
Sent: Wednesday, July 29, 2015 12:57 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: 1403 at 60Hz
As I understood it at the time
http://ibm-1401.info/1440Sys/WCP22_Project_Report_REV2013-12-13%20pm--1.pdf
This was pretty interesting. We used to have a dangling ribbon in the Help
Desk center that said
'Over printing is cool'. The ribbon stopped when over- printing so if you
used overprint to play a song or something it
I don't know power consuption, but nowadays it's not hard to get
semiconductor-based power supply which generater 60Hz or 50Hz or any
value you want (within some range).
--
Radoslaw Skorupka
Lodz, Poland
W dniu 2015-07-29 o 02:15, Vince Coen pisze:
.. and change settings for 120 to
On 2015-07-29, at 05:57, R.S. wrote:
I don't know power consuption, but nowadays it's not hard to get
semiconductor-based power supply which generater 60Hz or 50Hz or any value
you want (within some range).
I suppose a 1403 requires a couple kW. That shouldn't be an obstacle:
Long time ago but change a switch/plug setting inside via the rear.,
On 29/07/15 00:23, glen herrmannsfeldt wrote:
I wonder if anyone knows what has to change to move a 1403
from 50Hz to 60Hz?
If they use synchronous motors, then some belts or gears
would be different.
For transformers, you
If I remember, there are some capacitors to be changed near big cables
connections, motors need to be rewired from 50 to 60Hz (different
connections at terminal blocks TB´s) thats all I remember.
*Carlos Bodra
IBM
I wonder if anyone knows what has to change to move a 1403
from 50Hz to 60Hz?
If they use synchronous motors, then some belts or gears
would be different.
For transformers, you need more iron in the core for 50Hz,
so 50Hz transformers should be fine at 60Hz, but not always
the other way around.
.. and change settings for 120 to 230/240 volts is the biggest issue
frequency is not so serious providing the specific model is dual power
etc.
Been a very long time since I had to set one up.
On 29/07/15 00:23, glen herrmannsfeldt wrote:
I wonder if anyone knows what has to change to move
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