Original 1943 electrical trade vintage ad for STACKPOLE CARBON COMPANY.  Main office and plant was located in St. Marys, PA.

Manufacturers of Molded Metal Powder and Carbon Products.

Two Important Iron Core Developments. Iron Cores for Choke Coils and High-Resistivity Cores.

These little units have been designed for use with audio chokes, hash chokes, R-F chokes and various others. They consist of iron core having insulated leads and resembling the axial lead-type resistors. These cores reduce the physical dimension of the choke coil, and the iron serves to increase the "Q".

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