Tube-number record
880
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BrandRCA
ClassPower Triode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeGlass and Water-Cooled Plate
Base MaterialMetal terminals
Sections1
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Plate Voltage10500 V
Plate Dissipation20000 W
Grid 1 Voltage-1200 V
Cathode Current35000 mA
Audio Performance
Power Output46000 W
Key Features
- Water cooled
- Forced-air cooled
- High power output
- Tungsten filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| AF Power Amplifier & Modulator - Class B (Values for 2 tubes) | 10000 V | — | 3100 | 20 | 7000 mA |
| RF Power Amplifier - Class B Telephony | 10000 V | — | — | 20 | 2750 mA |
| RF Power Amplifier & Oscillator - Class C Telegraphy | 10000 V | — | — |
Application Notes
The filament current should never exceed 480 amperes, even momentarily. Water flow must start before application of any voltages.
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