Neutralizing Condenser NC-75

National Company; Cambridge & Malden (MA)

  • Year
  • 1946 ??
  • Category
  • Radio part (not a module) 
  • Radiomuseum.org ID
  • 355987
    • alternative name: National Toy Co.
    • Brand: Thrillbox

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Neutralizing Condenser NC-75 - National Company; Cambridge &
  • Shape
  • Miscellaneous shapes - described under notes.
  • Dimensions (WHD)
  • 95 x 120 x 70 mm / 3.7 x 4.7 x 2.8 inch
  • Notes
  • The National Model NC-75 Neutralizing Condenser was suitable for 75T, 808, 811, 812, and similar early valves.

    The aluminum disc electrodes are 2.75" (69.9 mm) in diameter, and the 0.25" (6.35 mm) diameter adjusting screw is provided with a locking clamp. The insulation rod is made of steatite.

    The capacitance range is approximately 2 - 12 pF, with corresponding air gaps of approximately 0.8 - 0.1 inch.

  • Net weight (2.2 lb = 1 kg)
  • 0.174 kg / 0 lb 6.1 oz (0.383 lb)
  • Mentioned in
  • - - Manufacturers Literature (National Radio Products Catalog No. 700, 1947, page 5.)
  • Author
  • Model page created by Bruce Taylor. See "Data change" for further contributors.

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