ACT 14
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BrandMarconi
ClassHF Amplifier and Oscillator Triode
Construction
Primary TypeTriode
EnvelopeForced-air cooled
Sections1
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Plate Voltage12000 V
Plate Dissipation10000 W
Audio Performance
Key Features
- Forced-air cooled
- Tungsten filament
- HF Transmitting Triode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| HF Power Amplifier and Oscillator Class C Telegraphy | 12000V | 9000 | 5000 | 45 | 2600mA |
| HF Power Amplifier and Oscillator Class C Telegraphy | 10000V | 9000 | 5000 | 45 | 2500mA |
| HF Power Amplifier and Oscillator Class C Telegraphy | 8000V | 9000 | 5000 | 45 | 2400mA |
| HF Power Amplifier Class C Anode Modulated | 10000V | 9000 | 5000 | 45 | 1050mA |
| HF Power Amplifier Class B Telephony | 12000V | 9000 | 5000 | 45 | 1200mA |
Application Notes
Cooling requirements: 600 cu. ft. per minute air blast at 8-in. water head pressure. Filament starting current must not exceed 105 A. For frequencies above 15 Mc/s, anode voltage must be derated (15MHz=100%, 20MHz=85%, 25MHz=65%, 40MHz=35%). Rigid connections to anode only.
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