• Country
• United States of America (USA)

• Manufacturer / Brand
• Ballantine Laboratories Inc.; Boonton, New Jersey

• Year
• 1949 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 357032

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

• Number of Tubes
• 9

• Valves / Tubes
• 6AU6 6AU6 6AU6 6AU6 6AL5 6AL5 12AU7 12AU7 6X4 0A2

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 115 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Electronic Voltmeter 305 - Ballantine Laboratories Inc.;

• Shape
• Tablemodel, with any shape - general.

• Notes

• Bridge rectifier for tube filaments.

• Mentioned in
• Vacuum-Tube Voltmeters, John F. Rider, 2nd Edition, 1951

• Author
• Model page created by Wolfgang Müllner. See "Data change" for further contributors.

• Other Models

• Here you find 17 models, 12 with images and 12 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Ballantine Laboratories Inc.; Boonton, New Jersey