[AMRadio] Thordarson Transformer Manual reprint

[Shirli Sieb]

Thordarson Transformer Manual
by Thordarson Electric Mfg Co

reprinted by Lindsay Publications Inc 

It's a neat-looking 1930's reprint:
"Inside the covers of this one book you get six different catalogs 
and manuals from the 1930's: Sound Amplifier Manual, Transmitter 
Guide, Serviceman's Guide, Radio Servicing Guide, Complete 
Transformer Catalog, and the "Tru-Fidelity" transformer guide. "

The blurb shows a page featuring a "500 Watt  Modulator and 
Speech Amplifier"

http://www.lindsaybks.com/bks3/thordar/index.html