OT: mag amp

[(doug harrison)]

Anybody here ever heard of a 'magnetic amplifier'? 

www.teslapress.com

George Trinkaus

[Joe]

I have that book, it's basically an introduction to how they might be used. More detailed information is found here:
http://www.tpub.com/content/neets/14180/css/14180_131.htm
There's also an old "basic electricity" Navy reprint at B&N, with a chapter on magnetic amps.

[Paul Perry (Frostwave)]

Triacs & power fets have made them obsolete, but I remember seeing some magnetic amplifier circuitry in a mains voltage stabiliser (made in the 1950s). It's a hell of a job, designing the transformers in them!!!