F-862-A
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BrandFederal Telephone and Radio Corporation
ClassPower Triode
BaseVertical, anode down
FilamentV @ mA
Construction
Primary TypeTriode
EnvelopeGlass and Metal (Water-cooled)
SectionsSingle
Filament / Heater
MaterialPure tungsten
Absolute Maximum Ratings
Plate Voltage20000 V
Plate Dissipation100000 W
Grid 1 Voltage-3000 V
Cathode Current10000 mA
Audio Performance
Power Output90000 W
Key Features
- Water-cooled anode
- Pure tungsten filament cathode
- Forced Air cooling for bulb and seals
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Radio-Frequency Power Amplifier and Oscillator—Class C Telegraphy | 18000V | - | - | 45 | 8330mA |
| Plate-Modulated Radio-Frequency Power Amplifier—Class C Telephony | 12000V | - | - | 45 | 5000mA |
| Audio-Frequency Power Amplifier and Modulator—Class B | 12000V | - | - | 45 | 6500mA |
Application Notes
Engineered for use as a radio-frequency amplifier, oscillator, or as a Class B modulator. Maximum ratings apply up to 1.6 megacycles.
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