• Year
  • 1900 ??
  • Category
  • Service- or Lab Equipment
  • Radiomuseum.org ID
  • 160374
    • alternative name: Jewell

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Portable AC & DC Voltmeter - Weston Electrical Instrument
  • Shape
  • Tablemodel, with any shape - general.
  • Notes
  • Weston Standard Portable Alternating and Direct Current Voltmeter.
    Calibration document enclosed in lid of the wooden box gives some data, valid for instrument No. 225:
    Resistance of 300 Volt coil at 70°F = 5199.5 Ohms. Resistance of 150 Volt coil at 70°F = 2599.8 Ohms. Standardized at Weston Laboratories Newark, N.J. U.S.A., April 8th, 1896. Plate between screw terminals indicates instrument patented in 1890.
  • Net weight (2.2 lb = 1 kg)
  • 6 lb (6 lb 0 oz) / 2.724 kg
  • Source of data
  • -- Original prospect or advert
  • Author
  • Model page created by Meyer Rochwerger. See "Data change" for further contributors.

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