Cohen Longwave Receiver

National Electric Signaling Co. (NESCO) or Supply; Washington, D.C.

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  • Année
  • 1914–1916 ?
  • Catégorie
  • Module radio avant 1926 (pas un composant ni clavier)
  • Radiomuseum.org ID
  • 281132
    • alternative name: National Electric Signaling Co. || National Electrical Supply Co.

 Spécifications techniques

  • Principe général
  • Circuit d'accord d'avant 1926 (pas de circuits bouchon)
  • Gammes d'ondes
  • GO et Très Grandes Ondes
  • Tension / type courant
  • Pas d'alimentation nécessaire
  • Haut-parleur
  • - Pour casque ou amplificateur BF
  • Matière
  • Boitier en bois
  • De Radiomuseum.org
  • Modèle: Cohen Longwave Receiver - National Electric Signaling Co
  • Forme
  • Modèle de table profil bas (grand modèle).
  • Dimensions (LHP)
  • 23 x 16 x 12 inch / 584 x 406 x 305 mm
  • Remarques

  • 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.

  • Auteur
  • Modèle crée par Richard Groshong. Voir les propositions de modification pour les contributeurs supplémentaires.

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Le modèle Cohen Longwave Receiver fait partie des collections des membres suivants.

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