Tube-number record
RD20XL
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BrandTesla
ClassCoaxial transmitting triode
BaseCoaxial
Filament9 V @ 180000 mA
Construction
Primary TypeTriode
EnvelopeGlass/Metal
Base MaterialCopper/Glass
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Heater NotesDirect heating, thoriated tungsten cathode, parallel feed
Absolute Maximum Ratings
Plate Voltage10000 V
Plate Dissipation20000 W
Audio Performance
Key Features
- Forced air cooling
- Coaxial design
- Squirrel-cage type cathode
- Short-wave triode
- Heavy-wall anode of OFHC copper
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Characteristic Data | — | 45000 | — | 45 | — |
Application Notes
Suitable for use as an oscillator or RF power amplifier in short-wave FM broadcast transmitters, TV transmitters (Class B linear amplifier), and industrial generators.
Datasheets
Datasheet: RD20XL.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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