> As I understood it at the time, larger S/360 and S/370 also > used motor-generator power supplies, though I don't know the > output frequency. The higher frequency means less filtering.
Generally 415 Hz. Why this odd number is beyond me. The Hitachi clones also used 415 Hz. > But yes, you can run a CDC machine off an electronic converter. Most CDC Cybers are indeed 400 Hz machines, but a few were made with a 60 Hz option. Last week I drove to Texas to get a "small" "departmental" Cyber 932 - they were all (or nearly all?) 60 Hz models. -- Will ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
