Plane of core memory

Dave Wade dave.g4ugm at
Thu Apr 18 17:07:38 CDT 2019

> -----Original Message-----
> From: cctalk <cctalk-bounces at> On Behalf Of Chuck Guzis via
> cctalk
> Sent: 18 April 2019 17:30
> To: Jim Manley via cctalk <cctalk at>
> Subject: Re: Plane of core memory
> On 4/18/19 9:02 AM, Jim Manley via cctalk wrote:
> > Jussi Kilpelainen's page cited above (
> >
> > o/) refers to the work of Ben North and Oliver Nash to create another
> > core memory shield for Arduino Unos.  Their site inspired Jussi to
> > create his shield kit, which can be viewed at:
> >
> >
> > <>
> I remember seeing that one some time ago.
> Anyone with a Williams tube project?  Mercury delay lines?

Whilst MSI Manchester run the Manchester Baby replica several days a week, and it does have (mostly) working Williams tubes, its often operated on semi-conductor memory as that allows us to talk to visitors, and not have to keep tweaking the store. 

The EDSAC replica at TNMOC uses delay lines as a ton of Mercury was too expensive and had health and safety implications.

> Magnetostrictive delay memory?
> --Chuck



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