3Q/221E
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ClassR.F. Power Amplifier Triode
BaseWater-cooled
Construction
Primary TypeTriode
EnvelopeWater-cooled
SectionsSingle
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Plate Voltage17500 V
Plate Dissipation20000 W
Cathode Current2500 mA
Audio Performance
Key Features
- Water-cooled
- Single-ended
- Tungsten filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B Telephony | 15000V | 8966 | 2900 | 26 | 2000mA |
| Class C Power Amplifier (Anode Modulated) | 15000V | 8966 | 2900 | 26 | 2000mA |
| Class C Power Amplifier or Oscillator (Unmodulated) | 17000V | 8966 | 2900 | 26 | 2500mA |
Application Notes
R.F. Power Amplifier Triode designed for water-cooled operation. Typical power outputs range from 10kW (Class B) up to 30kW (Class C unmodulated).
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