ACT 29
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BrandMarconi
ClassTriode
Construction
Primary TypeHF Power Amplifier and Oscillator
EnvelopeGlass and Metal Radiator
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage10000 V
Plate Dissipation1250 W
Grid 1 Voltage-1000 V
Cathode Current5000 mA
Audio Performance
Key Features
- Air-cooled transmitting triode
- Thoriated tungsten filament
- Suitable for use up to 80 Mc/s
- Forced air cooling for high dissipation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| HF Power Amplifier and Oscillator, Class C Telegraphy | 10000V | 3100 | 12900 | 40 | 500mA |
| Class C Anode Modulated | 8000V | 3100 | 12900 | 40 | 280mA |
Application Notes
The valve must be mounted vertically with the anode uppermost. If operated for periods greater than 15 minutes without anode current, filament voltage should be reduced to 50%.
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