The 370/165 and 168 ran on high frequency power. 400 or 420 HZ if I remember correctly. There may be others, but I worked with those. We had MG sets in sound proof enclosures. If you opened the covers you had better have sound proof ear muffs on. They were LOUD. Eh, what did you say?
Chris Blaicher Technical Architect Software Development Syncsort Incorporated 50 Tice Boulevard, Woodcliff Lake, NJ 07677 P: 201-930-8234 | M: 512-627-3803 E: cblaic...@syncsort.com -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Barry Merrill Sent: Wednesday, July 29, 2015 2:08 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: 1403 at 60Hz Most old pre-solid-state aircraft electronics also used 415 Hz because transformers are much lighter at higher frequency. Barry Merrill, EI/W5GN (where I use 14MHZ!) Herbert W. “Barry” Merrill, PhD President-Programmer MXG Software Merrill Consultants 10717 Cromwell Drive Dallas, TX 75229-5112 ba...@mxg.com Fax: 214 350 3694 – Still works, received as email Tel: 214 351 1966 – Unreliable, please use email www.mxg.com HomePage: FAQ answers most questions ad...@mxg.com License Forms, Invoice, Payment, ftp information supp...@mxg.com Technical Issues MXG-L FREE ListServer http://www.mxg.com/mxg-l_listserver/ -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of William Donzelli Sent: Wednesday, July 29, 2015 12:57 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: 1403 at 60Hz > 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 lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ________________________________ ATTENTION: ----- The information contained in this message (including any files transmitted with this message) may contain proprietary, trade secret or other confidential and/or legally privileged information. Any pricing information contained in this message or in any files transmitted with this message is always confidential and cannot be shared with any third parties without prior written approval from Syncsort. This message is intended to be read only by the individual or entity to whom it is addressed or by their designee. If the reader of this message is not the intended recipient, you are on notice that any use, disclosure, copying or distribution of this message, in any form, is strictly prohibited. If you have received this message in error, please immediately notify the sender and/or Syncsort and destroy all copies of this message in your possession, custody or control. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
