• Country
• United States of America (USA)

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

• Year
• 1951

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 361784

• Number of Tubes
• 11

• Valves / Tubes
• 6CB6 12AT7 6C4 6AG7 6AG7 12AT7 6C4 12AU7 5UP1 5U4 5Y3 0A2 0A2

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 50-60 Hz, 110-125 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Professional Television Oscilloscope 55 - National Radio Institute NRI;

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 10.5 x 13.75 x 16 inch / 267 x 349 x 406 mm

• Notes

• 5" CRT.

• Net weight (2.2 lb = 1 kg)
• 36.5 lb (36 lb 8 oz) / 16.571 kg

• Price in first year of sale
• 127.50 USD

• Literature/Schematics (1)
• - - Manufacturers Literature (National Radio News, June-July 1951, Vol. 14 No. 9, pages 3-11, 22 &14-15 "Now...New Model 55")

• Author
• Model page created by Steve Pizula. See "Data change" for further contributors.

• Other Models

• Here you find 21 models, 21 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