> On Jul 26, 2016, at 12:04 AM, jimlux <jim...@earthlink.net> wrote: > > > IBM mainframes used a similar scheme but I can't remember the details.
Yes. We had 3 3090 <https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3090.html>’s and they all incorporated multiple motor/generator units ( 3089 ) to generate 400Hz power ( in addition to chilled water distribution modules, etc. ) IBM 3089 Power Unit The IBM 3089 is connected to your mainline supply. It is designed to provide a stabilized 400 Hertz AC power source to units of the Processor Complex _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
