Universal Model SW-3 Model III

National Company; Cambridge & Malden (MA)

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  • Year
  • 1940–1945 ??
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 85117
    • alternative name: National Toy Co.
    • Brand: Thrillbox

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 3
  • Main principle
  • TRF with regeneration; 1 AF stage(s)
  • Tuned circuits
  • 2 AM circuit(s)
  • Wave bands
  • Broadcast, Long Wave and Short Wave.
  • Power type and voltage
  • Other, details in remarks or not known. / 6,3 / 135 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Universal Model SW-3 Model III - National Company; Cambridge &
  • Shape
  • Tablemodel, with any shape - general.
  • Notes
  • plug-in coils series "30-42" for coverage 90 - 35000 kHz, bandspread coils "30A - 35A" provide bandspread tuning in 10 - 160 m anateur bands;
    headphones operation only, no audio output stage,
    matching external power supply National 5886AB
    optional 6V vibrator pack 686 for 6V battery operation
    set can be switched to battery mode and runs with DC 1,5 / 90 volts using 1N5 1N5 1A5 tubes.
  • Price in first year of sale
  • 38.00 $
  • Author
  • Model page created by Martin Bösch. See "Data change" for further contributors.

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