7QR20
0 Tubes in archive
BrandTESLA
ClassOscilloscope Tube
Base8-pin
Filament6.3V @ 300mA
Construction
Primary TypeCathode Ray Tube
EnvelopeGlass
Base MaterialGlass with metal guide key
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated cathode
Absolute Maximum Ratings
Plate Voltage1000 V
Grid 2 Voltage500 V
Cathode Current0.05 mA
Audio Performance
Key Features
- All-glass construction
- Electrostatic focus
- Asymmetrical deflection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Operation at 500V | 500V | - | - | - | - |
| Operation at 800V | 800V | - | - | - | - |
Application Notes
The Tesla 7QR20 is the smallest in the Tesla series, suitable for small oscillographs or as a control screen for continuous monitoring of electrical processes.
Datasheet Viewer
Loading datasheet...
Sort by
Showing 1 to 0 of 0 results