IBM 1620

Chuck Guzis cclist at
Sun Aug 30 20:13:15 CDT 2015

On 08/30/2015 05:16 PM, Tothwolf wrote:

> According to IBM's paper, extra cores were threaded initially and
> used to replace any cores that tested bad during assembly. Any extras
> were crushed after assembly to remove them.

I suspect there were also extra rows after shipment as well.  I seem to 
remember a magnet and a broomstick that got used to fish out remnants in 
the 7090 (oil bath) core units.


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