• Anno
  • 1914–1916 ?
  • Categoria
  • Modulo per radio pre 1926 (non un particolare, nessun tasto)
  • Radiomuseum.org ID
  • 281132
    • alternative name: National Electric Signaling Co. || National Electrical Supply Co.

 Specifiche tecniche

  • Principio generale
  • Sintonizzatore pre 1926 (not a wave trap)
  • Gamme d'onda
  • Onde lunghe e/o Very Low Frequency (VLF).
  • Tensioni di funzionamento
  • Alimentazione non richiesta
  • Altoparlante
  • - Per cuffie o amplificatori esterni
  • Materiali
  • Mobile in legno
  • Radiomuseum.org
  • Modello: Cohen Longwave Receiver - National Electric Signaling Co
  • Forma
  • Soprammobile basso, con andamento orizzontale (grosse dimensioni).
  • Dimensioni (LxAxP)
  • 23 x 16 x 12 inch / 584 x 406 x 305 mm
  • Annotazioni
  • 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.

  • Autore
  • Modello inviato da Richard Groshong. Utilizzare "Proponi modifica" per inviare ulteriori dati.

 Collezioni | Musei | Letteratura

Collezioni

Il modello Cohen Longwave Receiver fa parte delle collezioni dei seguenti membri.

 Forum