• Country
• United States of America (USA)

• Manufacturer / Brand
• Triplett Electrical Instrument Co.; Bluffton (OH)

• Year
• 1956

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 99179

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

• Number of Tubes
• 1

• Valves / Tubes
• 1R5

• Wave bands
• - without

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - For headphones or amp.

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Vacuum Tube Voltmeter 631 - Triplett Electrical Instrument

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Dimensions (WHD)
• 5.5 x 7.5 x 3.7 inch / 140 x 191 x 94 mm

• Notes
• 34-Range VTVM and VOM, 50 microampere movement.

• Price in first year of sale
• 58.00 $

• Literature/Schematics (1)
• Allied Radio Catalog Nº 150, 1956

• Author
• Model page created by Vitor Oliveira. See "Data change" for further contributors.

• Other Models

• Here you find 139 models, 132 with images and 50 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Triplett Electrical Instrument Co.; Bluffton (OH)