Vacuum-Tube Voltmeter 303
Ballantine Laboratories Inc.; Boonton, New Jersey
- Country
- United States of America (USA)
- Manufacturer / Brand
- Ballantine Laboratories Inc.; Boonton, New Jersey
- Year
- 1949 ??
- Category
- Service- or Lab Equipment
- Radiomuseum.org ID
- 357029
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 3
- Wave bands
- - without
- Power type and voltage
- Powered by external power supply or a main unit. / 135 & 1 x 1.5 & 1 x 1.5 Volt
- Loudspeaker
- - - No sound reproduction output.
- from Radiomuseum.org
- Model: Vacuum-Tube Voltmeter 303 - Ballantine Laboratories Inc.;
- Notes
-
Full wave bridge rectifier converts AC to DC for the meter readout.
- 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