RD20XF
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BrandTESLA
ClassTransmitting Triode
Construction
Primary TypeTriode
EnvelopeHard glass and OFHC copper
Base MaterialCopper radiator
Sections1
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Plate Voltage15000 V
Plate Dissipation20000 W
Cathode Current5000 mA
Audio Performance
Key Features
- Air-cooled
- Direct heating
- OFHC copper anode
- Hard glass envelope
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF power amplifier, class C - anode modulation (A3) | 10000V | 15000 | 1865 | 28.5 | 2600mA |
| RF power amplifier or oscillator - A1 telegraphy (5 Mc/s) | 15000V | 15000 | 1700 | 28.5 | 4340mA |
Application Notes
The TESLA RD20XF tube is an air-cooled triode suitable for use as an oscillator, AF or RF power amplifier at frequencies up to 30 Mc/s.
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