• Country
• United States of America (USA)

• Manufacturer / Brand
• Accurate Instrument Co. Inc.; New York, NY

• Year
• 1968–1970

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 172980

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

• Wave bands
• - without

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

• Loudspeaker
• - - No sound reproduction output.

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: Tube Tester 257 - Accurate Instrument Co. Inc.;

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 350 x 90 x 230 mm / 13.8 x 3.5 x 9.1 inch

• Notes

• The Accurate 257 Tube Tester was advertised as a "new improved model 257" in 1969 and 1970.

  Tests Novars, Nuvistors, 10 pins, Magnovals, Compactrons, Decals. Individual section testing for shorts, leakage and emission. Leakage sensitivity up to 5 Megohms. 4.5" dual scale meter with dampening chamber.

  Identical to Maxon 257.

• Price in first year of sale
• 47.50 USD

• Literature/Schematics (1)
• Popular Mechanics (Dec. 1969, pg. 191)

• Author
• Model page created by Juhani Makivuoti † 21.09.13. See "Data change" for further contributors.

• Other Models

• Here you find 14 models, 14 with images and 9 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Accurate Instrument Co. Inc.; New York, NY