Two-Valve Broadcast Receiver

Thorpe (Brand) Thorpe Radio Valve Co / Bower Electric Ltd.; London

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  • Year
  • 1923
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 312815
    • Brand: Unidyne

 Technical Specifications

  • Number of Tubes
  • 2
  • Valves / Tubes
  • Main principle
  • TRF with regeneration
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Storage and/or dry batteries / 6 & 60 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case, TUBES VISIBLE.
  • from Radiomuseum.org
  • Model: Two-Valve Broadcast Receiver - Thorpe Brand Thorpe Radio
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Notes

  • The Bower Electric 2 Valve Set was advertised as a “wonderful 2 valve set” capable of receiving broadcast programmes up to 75 miles using variometer tuning, which the company described as “the ideal form.” The set was marketed as a complete outfit, supplied with all batteries and aerial equipment required for immediate operation.

    The receiver was promoted as powerful enough to operate a loudspeaker up to 20 miles on a PMG approved aerial, or four pairs of headphones at 50 miles, indicating a relatively high gain audio stage for an early 1920s two valve design.

    Technical Features

    • Circuit type: 2 valve broadcast receiver
    • Tuning: Variometer tuning
    • Range:
    • Up to 75 miles (headphones)
    • Loudspeaker operation up to 20 miles on PMG aerial
    • Four pairs of headphones up to 50 miles

    Power supply:

    • 6 volt accumulator (60 amp hour)
    • 60 volt H.T. battery

    Accessories included:

    • 100 ft aerial wire
    • 4 aerial insulators
    • 4,000 ohm headphones
  • Price in first year of sale
  • 15.75 £
  • Mentioned in
  • March 3, 1923 The Wireless World and Radio Review magazine page xxxviii
  • Literature/Schematics (1)
  • -- Original prospect or advert (Modern Wireless Apr 1923, p.xlii)
  • Author
  • Model page created by Alan Larsen. See "Data change" for further contributors.

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