On 05/04/2013 15:45, Gordon H wrote:> In message , Chris Whelan > writes >> On Fri, 05 Apr 2013 15:19:01 +0100, Gordon H wrote: >> >> [...] >> >>> Having said that, I remember back in the 1960s using a 300v rotary >>> convertor in the passenger footwell to produce the voltage for my >>> amateur radio transmitter which rested on the passenger seat. >> >> Only rotary converter I've ever seen was for a No19 set owned by a >> friend; they must be terribly inefficient things. >> Chris >> > Very likely, I bought mine in a radio junk sale I think, I also had a > friend who had a 19 set, but I built my tx from scratch.
Youve probably seen more than you think if you have ever caught a train.
Lots of British Rail coaching stock had them under the carridges.
Used to convert ETS (Electric Train Supply) from locomotives at 800v DC ish from Locomotives (vairies according to engine speed) to something usable for Heating, Lighting, Air Conditioning, Battery Charging etc?
BR called them Motor Alternator Sets (MAs).