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- Newsgroups: sci.electronics
- Path: sparky!uunet!decwrl!pa.dec.com!engage.pko.dec.com!nntpd.lkg.dec.com!empror.enet.dec.com!pierson
- From: pierson@empror.enet.dec.com (dave pierson)
- Subject: Re: Dynamotors;
- Message-ID: <1992Sep14.135719.6917@nntpd.lkg.dec.com>
- Sender: usenet@nntpd.lkg.dec.com (USENET News System)
- Organization: Digital Equipment Corporation
- Date: Mon, 14 Sep 1992 14:53:57 GMT
- Lines: 30
-
- In article <xdwn!8m@dixie.com>, jgd@dixie.com (John De Armond) writes...
- >In article <larryd.716229475@milton> larryd@milton.u.washington.edu (Larry
- >Desoto) writes:
- >
- >>Dynamoters...you forgot the true dinosaurs of High Voltage. The proper
- >>technique when using dynamotor powered ARC-5 transmitters was to press
- >>the mike key and wait a second or so until the motor was up to speed.
- >>It really brings back memories of adding another battery to the car's
- >>electrical system to bring the voltage up to 24 volts for the dynamoters.
- >
- >I have the Mother of all dynamotors. About 1200 volts at an amp or so.
- >No idea what it came off of.
-
-
- Ahemmmmmmmm. Chicago, Milwaukee, St Paul & Pacific RR. Electric
- Zone, Harlowton, Mt to Avery, ID. At 30 mile intervals, rotary
- convertor substations, 2400 VAC 3 phase in, 3,000Vdc out. (I
- disremember the ratings, but think of kiloamps....). All torn out now.
- Or any transit system, til recently 600 VDC at thousands of amps, from
- the same sort of rigs. Stood 15 feet high.
-
- In these sizes, efficiencies could approach 90%.
-
- thanks
- dave pierson |the facts, as accurately as i can manage,
- Digital Equipment Corporation |the opinions, my own.
- 146 Main St |I am the NRA.
- Maynard, Mass
- 01754 pierson@majsty.enet.dec.com
- "He has read everything, and, to his credit, written nothing." A J Raffles
-