VLF Preselector LF-10

National Company; Cambridge & Malden (MA)

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  • Year
  • 1964 ??
  • Category
  • Radio module post 1925 (not a part, not a key)
  • Radiomuseum.org ID
  • 87634
    • alternative name: National Toy Co.
    • Brand: Thrillbox

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

 Technical Specifications

  • Number of Transistors
  • 8
  • Semiconductors
  • Main principle
  • RF-Circuit or wave trap (separate, can also be an antenna with amp.)
  • Wave bands
  • Long Wave and/or Very Low Frequency (VLF).
  • Power type and voltage
  • Powered by external power supply or a main unit.
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 3 inch = 7.6 cm
  • Power out
  • 1.5 W (max.)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: VLF Preselector LF-10 - National Company; Cambridge &
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 16.5 x 3.5 x 12.75 inch / 419 x 89 x 324 mm
  • Notes

  • The National LF-10 VLF Preselector was designed to be used with the National HRO-500 receiver. It covers 5-500 kHz in four bands. An optional audio filter was available.

  • Net weight (2.2 lb = 1 kg)
  • 12 lb (12 lb 0 oz) / 5.448 kg
  • Author
  • Model page created by Martin Bösch. See "Data change" for further contributors.

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