<p>Original 1943 electrical trade vintage ad for <b><span style="font-size: 14px;">STACKPOLE CARBON COMPANY. </span></b>Main office and plant was located in St. Marys, PA.</p><p> Manufacturers of Molded Metal Powder and Carbon Products.</p><p>Two Important Iron Core Developments. Iron Cores for Choke Coils and High-Resistivity Cores.</p><p>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".</p><p>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.<br></p>
- SKU zl530
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