Tube-number record
7QR20
0 archive entries
BrandTESLA
ClassOscilloscope Tube
Base8-pin
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
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 | 500 V | — | — | — | — |
| Operation at 800V | 800 V | — | — | — | — |
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.
Datasheets
Datasheet: 7QR20.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
0 results