Cohen Longwave Receiver
National Electric Signaling Co. (NESCO) or Supply; Washington, D.C.
- País
- Estados Unidos
- Fabricante / Marca
- National Electric Signaling Co. (NESCO) or Supply; Washington, D.C.
- Año
- 1914–1916 ?
- Categoría
- Módulo de radio de antes de 1926 (ni parte ni manipulador)
- Radiomuseum.org ID
- 281132
-
- alternative name: National Electric Signaling Co. || National Electrical Supply Co.
- Principio principal
- Tuner pre 1926 (not a wave trap)
- Gama de ondas
- Long Wave and/or Very Low Frequency (VLF).
- Tensión de funcionamiento
- No necesita alimentación
- Altavoz
- - Este modelo usa amplificador externo de B.F.
- Material
- Madera
- de Radiomuseum.org
- Modelo: Cohen Longwave Receiver - National Electric Signaling Co
- Forma
- Sobremesa apaisado (tamaño grande).
- Ancho, altura, profundidad
- 23 x 16 x 12 inch / 584 x 406 x 305 mm
- Anotaciones
-
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.
- Autor
- Modelo creado por Richard Groshong. Ver en "Modificar Ficha" los participantes posteriores.
- Otros modelos
-
Donde encontrará 31 modelos, 29 con imágenes y 2 con esquemas.
Ir al listado general de National Electric Signaling Co. (NESCO) or Supply; Washington, D.C.
Colecciones
El modelo Cohen Longwave Receiver es parte de las colecciones de los siguientes miembros.