Teletype ASR33 110 or 220V?

On Thu, 28 Jun 2012, Sander Reiche wrote: Things are not so simple. A look in the parts list 1184B for the teletype shows that there were 5 different motors. The parts list on bitsavers is that from 1973. It has only 4 motors. Our parts list from 1974 shows a "new" 5th motor. Motors: 182241 1.6 Amp 60Hz 182267 1.7 Amp 50Hz 181870 2.0 Amp 60Hz 181861 0.8 Amp 60Hz (No longer available, use 181870) and the 5th motor: 183991 (no data given) from the picture, this motor seems to have a centrifugal governor. So it is eventually adjustable for 50/60 Hz. From the Amperage, the 181861 seems to be a 220V motor, which seems strange in conjunction with 60Hz. Perhaps a typo? But these data is identical in the 1973 and in the 1974 catalogue. And to make things even more difficult, there is a second table for pairs of gear sets which are to be used for different motors and transmission speeds. The given speeds long from 60 to 100 WPS. Another fact: In some of our 220V 50Hz machine there are step down transformers in the piedestal, in some not. Maybe that those machines were feed from step down transformers in the 19"-rack of the computermachinery they were used with. Klemens -- klemens krause http://computermuseum.informatik.uni-stuttgart.de