Ultra High Frequency Converter HFC(AC)

National Company; Cambridge & Malden (MA)

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  • Year
  • 1932–1936 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 49563
    • 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
  • RF Converter/Adapter (not voltage converter)
  • Wave bands
  • Short Wave (SW only)
  • Power type and voltage
  • Powered by external power supply or a main unit. / 2.5VAC (for filaments) and -8, 67.5, 135 DC Volt
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Ultra High Frequency Converter HFC - National Company; Cambridge &
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 9 x 7 x 10 inch / 229 x 178 x 254 mm
  • Notes

  • The National HFC (AC) Ultra High Frequency Converter is the VAC only version of the National HFC converter. It receives the 28 and 56 MHz bands with two sets of (two) plug-in coils and down-converts either of these bands to the BC band for reception with a BC band receiver. Most suited for use with TRF broadcast band receivers. Has a National H Dial for tuning.

    Requires 67.5V and 135V for B+ supply and -8V for C- supply.  Also requires 2.5VAC for the filaments.

  • Price in first year of sale
  • 39.50 USD
  • External source of data
  • Ernst Erb
  • Mentioned in
  • National Catalog No. 220 - 1933

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