• Country
• United States of America (USA)

• Manufacturer / Brand
• National Radio Institute (NRI); Washington, DC

• Year
• 1947 ?

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 196898

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

• Number of Tubes
• 4

• Valves / Tubes
• 6SL7 6E5 1-V 6Y6G

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 110-120 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Professional Resistor-Condensor Tester 112 - National Radio Institute NRI;

• Shape
• Tablemodel, slant panel.

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

• Notes

• Capacitance/Resistance & Leakage Tester.

  • Six capacitor ranges: 100pF to 200uF
  • Six resitance ranges: 10 Ohms to 20 Mega Ohms.
  • Capacitance as low as 10pF and resistance as low as 1 Ohm can be estimated.
  • DC leakage test 600V

  Maroon crackle finish cabinet. Heavy rubber test leads and two special connectors for low value  capacitors and resistors. Linear scale.

  Advertised in Oct-Nov 1948 NRI National Radio News.

  6SL7 is bridge amplifier.

• Net weight (2.2 lb = 1 kg)
• 11 lb (11 lb 0 oz) / 4.994 kg

• Price in first year of sale
• 34.25 USD

• Author
• Model page created by Gottfried Silberhorn. See "Data change" for further contributors.

• Other Models

• Here you find 20 models, 20 with images and 8 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from National Radio Institute (NRI); Washington, DC