GL-891
0 Tubes in archive
BrandGeneral Electric
ClassPliotron Transmitting Tube
Construction
Primary TypeTriode
EnvelopeWater-cooled Anode
Base MaterialMetal/Insulator
Sections1
Filament / Heater
MaterialTwo-unit type
Absolute Maximum Ratings
Plate Voltage15000 V
Plate Dissipation7500 W
Grid 1 Voltage-3000 V
Cathode Current2000 mA
Audio Performance
Typical THD5%
Power Output22000 W
Key Features
- Water-cooled anode
- Double-filament type
- Transmitting tube
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Audio-Frequency Power Amplifier | 8000V | - | - | 8 | 900mA |
| Class B Audio-Frequency Power Amplifier (2 tubes) | 10000V | - | - | 8 | 3200mA |
| Class C Radio-Frequency Power Amplifier - Telegraphy | 10000V | - | - | 8 | 1450mA |
Application Notes
The GL-891 can be operated at frequencies as high as 1.6 megacycles at maximum ratings. Operation up to 20 MHz is possible with reduced plate voltage and power input.
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