Improved Wallace Valve Detector No Battery Switch

Wallace & Co. (Paul E.); New York City, New York

  • Année
  • 1913
  • Catégorie
  • Module radio avant 1926 (pas un composant ni clavier)
  • Radiomuseum.org ID
  • 327564

 Spécifications techniques

  • No. de tubes
  • 1
  • Principe général
  • Détecteur à lampe sans circuit d'accord
  • Gammes d'ondes
  • - sans
  • Tension / type courant
  • Piles (rechargeables ou/et sèches)
  • Haut-parleur
  • - Pour casque ou amplificateur BF
  • Matière
  • Boitier en bois
  • De Radiomuseum.org
  • Modèle: Improved Wallace Valve Detector [No Battery Switch] - Wallace & Co. Paul E.; New
  • Forme
  • Modèle de table boitier avec vouvercle
  • Remarques
  • Improved Wallace Valve Detector. The last advertisement for Wallce in October, 1913, mentioned a new "improved" Valve Detector that could be purchased through C. Brandes Inc. who was taking over retail sales for Wallace. The Detector pictured is believed to be the last version of the Wallace Valve Detector produced without the battery switch.    

    In the late summer of 1913 Deforest decided to take legal action against Wallace over the tubes Wallace was purchasing from McCandless. Wallace was having McCandless build tubes for him internally identical to the Deforest spherical Audion in an unbased tubular envelope for use in his Wallace Valve Detector. Wallace lost his case and in November Deforest started advertising his RJ4 Audion Valve Detector which was a direct copy of the Wallace Valve Detector. 

  • Prix de mise sur le marché
  • 13.50 $
  • Littérature
  • -- Original prospect or advert (October, 1913 Modern Electrics magazine page 732)
  • Auteur
  • Modèle crée par Alan Larsen. Voir les propositions de modification pour les contributeurs supplémentaires.

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