Challenge No. 40

Radiax Ltd.; London

  • Anno
  • 1923 ?
  • Categoria
  • Radio a galena (a cristallo o a diodo, senza valvole o transistores)
  • Radiomuseum.org ID
  • 77083

 Specifiche tecniche

  • Principio generale
  • Rivelazione a galena / semi-conducteur
  • Gamme d'onda
  • Solo onde medie (OM).
  • Tensioni di funzionamento
  • Alimentazione non richiesta
  • Altoparlante
  • - Per cuffie o amplificatori esterni
  • Radiomuseum.org
  • Modello: Challenge No. 40 - Radiax Ltd.; London
  • Annotazioni
  • Advertised in Popular Wireless Weekly (1 Nov 1924), it was described as “a new Radiax production, designed and built on entirely new principles… the result of much experiment and test.” The set was intended to deliver the maximum sensitivity and power obtainable from a crystal receiver, using the firm’s own Apex Super Crystal with silver spear‑point cat’s‑whisker detector.

    Wave range: 300 – 500 metres 
    Price (1924): £2 2 s

  • Letteratura / Schemi (1)
  • -- Original prospect or advert (Popular Wirless Weekly Nov 1, 1924, p.525)

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