• Year
  • 1924 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 197056

 Technical Specifications

  • Number of Tubes
  • 3
  • Valves / Tubes
  • Main principle
  • TRF with regeneration; Reflex
  • Wave bands
  • Broadcast and LongWave in ONE range.
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Monotrol 51 - Sleeper Radio Corp.; New York
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Notes
  • Has a plaque that says: Sleeper Inverse Duplex. For reception distance of 500 km. One single tuning knob, one knob for detector and another for amplifiers. To be used without need for earth or external antenna by using the Sleeper Monotrol Loop antenna.
  • Mentioned in
  • Revista Telegráfica - Abril 1924
  • Author
  • Model page created by Javier Albinarrate. See "Data change" for further contributors.

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