Variable Inductor 107N

General Radio Company; Cambridge (MA)

  • Year
  • 1946 ?
  • Category
  • Service- or Lab Equipment
  • Radiomuseum.org ID
  • 259759
    • alternative name: GenRad

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Variable Inductor 107N - General Radio Company;
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 6.5 x 8.75 x 6.5 inch / 165 x 222 x 165 mm
  • Notes
  • The General Radio 107N is a variable inductor. The model consists of two coils, a rotor and a stator, which are mounted concentrically.  As the position of the rotor is changed, the coupling between the two coils changes, thus causing the inductance to vary.  The total inductance range is over 25:1. The maximum power is 15W.

    Separate terminals are brought out for both the rotor and the stator so that they may be connected in series or in parallel as a self-inductor, or used separately as a mutual inductor.

    The 107 was available in 5 different versions, each covering a different range of inductances:

    Model Mutual Inductance DC Resistance Self-Inductance (Series) Self-Inductance (Parallel)
    107-J 0 - 10.8 uh 0.05 ohms 8 - 50 uh 2 - 12.5 uh
    107-K 0 - 110 uh 0.38 ohms 80 - 500 uh 20 - 125 uh
    107-L 0 - 1.1 mh 4.6 ohms 0.8 - 5 mh 0.2 - 1.25 mh
    107-M 0 - 11 mh 32 ohms 8 - 50 mh 2 - 12.5 mh
    107-N 0 - 110 mh 410 ohms 80 - 500 mh 20 - 125 mh

     

  • Net weight (2.2 lb = 1 kg)
  • 5 lb (5 lb 0 oz) / 2.270 kg
  • Price in first year of sale
  • 55.00 $
  • Mentioned in
  • - - Manufacturers Literature
  • Author
  • Model page created by Antonio Marra. See "Data change" for further contributors.

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