LGP-30 Memory Drum Update

On 1/4/17 1:06 PM, Jon Elson wrote: > On 01/04/2017 09:03 AM, Klemens Krause wrote: >> >> >>> We both have analog recordings (from digitizing scopes) and logic analyzer dumps. So concerning the LGP-30, all relevant information about the drum has been saved :-) >>> >> >> We have a second LGP-30 drum in our museum. It is damaged by water. >> (large rusted areas, probably from water between heads and drum). >> I'm dreaming to wash the brown oxide coating off with a solvent like >> acetone, polish the drum and repaint it. >> As magnetic paint I would try iron oxide from audio tapes solved in acetone or some other solvent. >> Perhaps one could ask an airbrush artist to do this. >> Rumours say, that the drums originally also were coated "by hand". >> Rewriting the timing tracks should not be impossible with todays >> electronics. >> There is another guy here in germany, who has a LGP-30 with heavily >> corroded drum. That would be certainly interesting for him. >> > Previous messages suggested the LGP-30 drum was plated with nickel. If there are amateur astronomers with a vacuum evaporator, it might be possible to get them to adjust their setup slightly to vacuum evaporate nickel on your drum, after refinishing the base. You'd need a rig to slowly turn the drum while evaporating the nickel. Some other research labs at universities might have the necessary equipment, also - check with the Physics department (or electrical engineering). > > Jon