F-124-R
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BrandFederal
ClassPower Triode
BaseBase terminals 1-6
Construction
Primary TypeTriode
EnvelopeForced-air-cooled anode
Sections1
Filament / Heater
MaterialPure tungsten
Absolute Maximum Ratings
Plate Voltage20000 V
Plate Dissipation20000 W
Grid 1 Voltage-3000 V
Cathode Current35000 mA
Audio Performance
Power Output39000 W
Key Features
- Forced-air-cooled anode
- Pure tungsten multi-strand filament
- 20 Kilowatts Plate Dissipation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Audio-Frequency Power Amplifier and Modulator—Class B (Two Tubes) | 10000V | - | 3750 | 40.5 | 6000mA |
| Radio-Frequency Power Amplifier—Class B | 17500V | - | - | 40.5 | 1680mA |
| Radio-Frequency Power Amplifier and Oscillator—Class C Telegraphy | 15000V | - | - | 40.5 | 4300mA |
| Plate-Modulated Radio-Frequency Power Amplifier—Class C Telephony | 12000V | - | - | 40.5 | 2800mA |
Application Notes
Mounting Position: Vertical, Anode Down. Requires forced air flow (2100 CFM at 20kW) for cooling. Maximum ratings apply up to 20 megacycles.
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