Tube-number record
804
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BrandRCA
ClassR-F Power Amplifier Pentode
Base5-pin
Construction
Primary TypePentode
EnvelopeT-16
Base MaterialMicanol
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage1500 V
Plate Dissipation50 W
Grid 2 Voltage300 V
Grid 1 Voltage-300 V
Cathode Current100 mA
Audio Performance
Key Features
- Thoriated Tungsten filament
- Suppressor-modulated capable
- Grid-modulated capable
- Plate-modulated capable
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| R-F Power Amplifier - Class B Telephony (CCS) | 1000 V | — | — | — | 45 mA |
| R-F Power Amplifier & Oscillator - Class C Telegraphy (ICAS) | 1500 V | — | — | — | 100 mA |
Application Notes
The 804 can be operated as a crystal-controlled oscillator with typical plate volts of 1250V and plate current of 42mA.
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