Motor generator

On 5/5/2021 7:18 PM, Jules Richardson via cctalk wrote: While I was in grad school at U.W. (the one in Wisconsin) we had obtained via surplus an IBM 7094 II from military surplus - I seem to recall WSMR (White Sands Missle Range). Of course, it had an MG. We got it put together and with a replaced transistor here and there (one of which was modern silicon) we got it running. We had NO peripherals, but my friend Paul came up with the idea to use a sense switch to talk RS-232 at 9600bps, and using that he got the Purdue University Fast FORTRAN Translator (PUFFT)loaded and up and running, and I wrote some support code on a Datacraft 6024 to send it card images and receive print lines. One evening after supper I convinced my wife to let me head down to the CS building and play. I stepped into the CS building and man, there was a lot of smokey smell and obvious evidence of smoke - but no alarms. It got worse as I headed down towards the basement where we had the gear set up. It turned out one of the bearings in the MG had welded itself to the shaft (and not for lack of proper lubrication). Thing was about 5" in diameter. That put us out of commission for a while, until many months later the UW Machine shop fixed it up. Not too long after that machine, and an IBM 1410 that had been donated by Oscar Mayer were sold off to a place in Ohio where they actually were still using that second hand gear in 1977 - and it was that very same outfit that we visited decades later and recovered the IBM 1410 PR155 operating system tape and diagnostics, a copy of OS/360, and other interesting stuff. JRJ