Cohen Longwave Receiver

• anderer Name: National Electric Signaling Co. || National Electrical Supply Co.

This is an early longwave receiver (1,000 to 10,000 meters) based on the Louis Cohen patent of 1914 (U.S. patent 1,123,098). It was made by the National Electrical Supply Co. and is actually a tuner designed for regenerative receiver operation. Note that Dr. Louis Cohen was a Professor of Radio Engineering at George Washington University and a famous consulting radio engineer in Washington D.C. who worked for a variety of U.S. military and government organizations. His receiver designs were used by the U.S. Navy series of Cohen Receivers (e.g. Types A, B, C). Dr. Cohen also participated in the Radio Regulation Conferences in Washington with then Secretary of Commerce Herbert Hoover, the 31-st President of the United States.

Hier finden Sie 31 Modelle, davon 29 mit Bildern und 2 mit Schaltbildern.
Alle gelisteten Radios usw. von National Electric Signaling Co. (NESCO) or Supply; Washington, D.C.