30 Aug
2015
30 Aug
'15
6:28 a.m.
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Paul
Koning
Sent: 30 August 2015 13:20
To: General Discussion: On-Topic and Off-Topic Posts
<cctalk at classiccmp.org>
Subject: Re: IBM 1620
correct
On Aug 30, 2015, at 4:49 AM, Dave G4UGM
<dave.g4ugm at gmail.com>
wrote:
...
> IBM had special machines to
> position and thread them.
> http://ibm-1401.info/IBMCoreArraysIEEEMagnetics1969.pdf
Interesting. I remember learning about the processes DEC used. No fancy
machines, just a flat plate jig with slots to hold the cores in their position, and nimble-fingered Oriental ladies to
thread the wire through
the
core planes by hand. Seemed sensible to me; that is
the process I was
thinking about for this case.
paul
Surely DEC used machine threaded cores later on. There is a 16k (I think)
DEC board in the Museum of Science and Industry in Manchester that must be
machine woven as you can't see the individual cores without heavy
magnification...