My understanding was that the mercury delay lines needed periodic repairs ( not sure what the cause was but mercury does dissolve into many metals ). If I were going to make a delay line memory, I'd go with the magnetostrictive. These are practical to make. One just needs a little ingenuity and a spool of piano wire. Dwight
________________________________ From: cctalk <cctalk-boun...@classiccmp.org> on behalf of Al Kossow via cctalk <cctalk@classiccmp.org> Sent: Thursday, April 18, 2019 9:42 AM To: cctalk@classiccmp.org Subject: Re: Plane of core memory On 4/18/19 9:30 AM, Chuck Guzis via cctalk wrote: > Anyone with a Williams tube project? The 1401 guys at CHM were working on one using a real 701 tube. I don't think it was ever finished. @tubetimeus built a small core array with Bulgarian cores https://twitter.com/TubeTimeUS/status/1053424445463752704 Discussion of the EDSAC rebuild https://www.youtube.com/watch?v=xGEAPVCuwvY Haven't heard if anyone has tried to get one of the Russian MR lines on eBay to do anything, or if anyone has a running Packard-Bell PB-250
