Original 1943 electrical trade vintage ad for JOHN C DOLPH COMPANY.  Main office and plant was located at 166-8 Emmett Street, Newark, NJ.

Manufacturers of Insulating Varnishes and Compounds.

Insulated for 30,000 volts - air-cooled - Synthite PX-5.

Insulating Transformers like the 8.3 KVA air cooled unit partly completed above provide isolation of circuits having a potential difference of 30,000 volts. This certainly is of interest. To insure non-failing insulation, the manufacturers, Nothelfer Winding Laboratories of Trenton, New Jersey, specified Dolph's Synthite PX-5 Black Baking Varnish for impregnation of all their windings.

Has product image, descriptions, applications and specifications to provide extensive product details.

Unbound from a 1943 electrical engineering magazine, this unique old one-page advertisement would display beautifully matted and framed. Nice graphics. World War 2 propaganda. A fabulous addition to your retro electrical library.