IBM 1620

Paul Koning paulkoning at
Sun Aug 30 07:20:07 CDT 2015

> On Aug 30, 2015, at 4:49 AM, Dave G4UGM <dave.g4ugm at> wrote:
> ...
>> IBM had special machines to
>> position and thread them.

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 correct 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.


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