Improved Wallace Valve Detector No Battery Switch

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

  • Anno
  • 1913
  • Categoria
  • Modulo per radio pre 1926 (non un particolare, nessun tasto)
  • Radiomuseum.org ID
  • 327564

 Specifiche tecniche

  • Numero di tubi
  • 1
  • Principio generale
  • Rivelazione a valvola (senza sintonia)
  • Gamme d'onda
  • - senza
  • Tensioni di funzionamento
  • Batterie (di accumulatori e/o a secco)
  • Altoparlante
  • - Per cuffie o amplificatori esterni
  • Materiali
  • Mobile in legno
  • Radiomuseum.org
  • Modello: Improved Wallace Valve Detector [No Battery Switch] - Wallace & Co. Paul E.; New
  • Forma
  • Soprammobile a cassapanca o cassetta, solitamente con coperchio (NON a leggio)
  • Annotazioni
  • 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. 

  • Prezzo nel primo anno
  • 13.50 $
  • Bibliografia
  • -- Original prospect or advert (October, 1913 Modern Electrics magazine page 732)
  • Autore
  • Modello inviato da Alan Larsen. Utilizzare "Proponi modifica" per inviare ulteriori dati.

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