On Wed, 9 Jan 2008 09:36:22 -0000, Phil Payne wrote: >... every machine was powered via motor-generators.
For those of you who might not know what that was or why, the processors of that time generally specified 415 Hz three phase power to operate them. The utilities provide 60 Hz (in the USA) or 50 HZ. AThe motor-generators have a motor powered by the utility supplied power driving a generator that produced the 415 Hz power. These were quite massive units with considerable rotating mass that acted as a flywheel. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
