• Country
• United States of America (USA)

• Manufacturer / Brand
• National Company; Cambridge & Malden (MA)

• Year
• 1957 ?

• Category
• Radio module post 1925 (not a part, not a key)

• Radiomuseum.org ID
• 87768

• • alternative name: National Toy Co.
  • Brand: Thrillbox

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

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Direction Finder RDF-66 - National Company; Cambridge &

• Dimensions (WHD)
• 10 x 7 x 8.5 inch / 254 x 178 x 216 mm

• Notes

• external loop antenna with an adjustable compass rose used for direction finding with long wave non-directional beacons matching the National NC-66 receiver. Features also an external signal strength meter. Can be operated on top of oder in a short distance from the receiver by means of a cable.

  Takes power from the NC-66. Shipping weight 8 pounds.

• Price in first year of sale
• 39.95 USD

• Source of data
• -- Collector info (Sammler)

• Literature/Schematics (1)
• The National RDF 66 Direction Finder manual, undated, pages 1-6

• Literature/Schematics (2)
• 1958 Allied catalog No. 170, page 266.

• Author
• Model page created by Martin Bösch. See "Data change" for further contributors.

• Other Models

• Here you find 445 models, 284 with images and 185 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from National Company; Cambridge & Malden (MA)