Vacuum-Tube Voltmeter 728A
General Radio Company; Cambridge (MA)
- Country
- United States of America (USA)
- Manufacturer / Brand
- General Radio Company; Cambridge (MA)
- Year
- 1949 ??
- Category
- Service- or Lab Equipment
- Radiomuseum.org ID
- 357035
-
- alternative name: GenRad
Click on the schematic thumbnail to request the schematic as a free document.
- Wave bands
- - without
- Power type and voltage
- Dry Batteries / 3 x 45 & 2 x 1.5 Volt
- Loudspeaker
- - - No sound reproduction output.
- from Radiomuseum.org
- Model: Vacuum-Tube Voltmeter 728A - General Radio Company;
- Notes
-
3 (2x1.5) V Dry Cell for Filament.
One of the 45V batteries uses a center tap for +/-22.5V.
- 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 241 models, 212 with images and 131 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from General Radio Company; Cambridge (MA)