HRO Prototype 1.0 modified

National Company; Cambridge & Malden (MA)

  • Year
  • 1935 ?
  • Category
  • Commercial Receiver (may include amateur bands)
  • Radiomuseum.org ID
  • 281376
    • alternative name: National Toy Co.
    • Brand: Thrillbox

 Technical Specifications

  • Number of Tubes
  • 9
  • Main principle
  • Superhet with RF-stage; ZF/IF 456 kHz; 2 AF stage(s)
  • Tuned circuits
  • 11 AM circuit(s)
  • Wave bands
  • Broadcast plus more than 2 Short Wave bands.
  • Power type and voltage
  • Powered by external power supply or a main unit.
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 1.5 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: HRO Prototype [1.0 modified] - National Company; Cambridge &
  • Shape
  • Boatanchor (heavy military or commercial set >20 kg).
  • Dimensions (WHD)
  • 438 x 223 x 300 mm / 17.2 x 8.8 x 11.8 inch
  • Net weight (2.2 lb = 1 kg)
  • 14.5 kg / 31 lb 15 oz (31.938 lb)

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The model HRO is part of the collections of the following members.

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