• Country
• United States of America (USA)

• Manufacturer / Brand
• Readrite Meter Works; Bluffton (OH)

• Year
• 1930 ?

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 54963

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

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC)

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Tube Tester 400 - Readrite Meter Works; Bluffton

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Notes
• 8 sockets with different heater voltages.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 2 = 1932 (Models 1931/1932)

• Other Models

• Here you find 45 models, 35 with images and 22 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Readrite Meter Works; Bluffton (OH)