Professional Volt-Ohm-Mil-Ammeter 45

National Radio Institute (NRI); Washington, DC

Data
Forum
Pictures
Collections

  • Year
  • 1947 ?
  • Category
  • Service- or Lab Equipment
  • Radiomuseum.org ID
  • 245954

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

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • Dry Batteries / 1.5 & 30 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Professional Volt-Ohm-Mil-Ammeter 45 - National Radio Institute NRI;
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 6.625 x 7.875 x 5.25 inch / 168 x 200 x 133 mm
  • Notes

  • Advertised in National Radio News Vol 13 Oct-Nov 1948 No. 5 (Issued by NRI Training headquarters.  Manufactured by the Triplett Electrical Instrument Co.

    Ranges:

    • DC Volts (20k Ohm per volt fsd): 3, 12, 30, 300, 1200
    • AC Volts (5k Ohm per volt fsd): 3, 12, 30, 300, 1200
    • Amps 12
    • Milliamperes DC: 1.2, 12, 120
    • Microamps DC: 60
    • Ohms (1.5V): 1,000 (centre =4), 10,000 (centre = 40)
    • Megaohms (30V): 1M (centre = 4k), 100M (centre = 400k)

    Batteries: 1 x D cell & 1 x 30V Minimax for Ohms ranges.

    Accessories: Leather carrying strap, 50" test leads, alligator clips, instructions.

    Detachable cover and "output meter" feature.

     

  • Net weight (2.2 lb = 1 kg)
  • 5 lb (5 lb 0 oz) / 2.270 kg
  • Price in first year of sale
  • 39.95 USD
  • Author
  • Model page created by Michael Watterson. See "Data change" for further contributors.

 Collections | Museums | Literature

 Forum