CAT 29
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BrandMarconi
Classtransmitting triode
BaseWater jacket mounting
Construction
Primary Typetriode
EnvelopeWater-cooled anode
Base MaterialThoriated tungsten
Sections1
Filament / Heater
Materialthoriated tungsten
Warm-up Time30s
Absolute Maximum Ratings
Plate Voltage15000 V
Plate Dissipation18000 W
Grid 1 Voltage-2000 V
Cathode Current20000 mA
Audio Performance
Key Features
- Water-cooled anode
- Thoriated tungsten filament
- Suitable for RF heating
- Forced air cooling for seals
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| HF Power Amplifier Class C Telegraphy | 15000V | 95000 | 4750 | 45 | 3350mA |
| HF Power Amplifier Class C Telegraphy | 10000V | 95000 | 4750 | 45 | 3200mA |
| HF Power Amplifier Class C Anode Modulated | 12000V | - | - | - | 2050mA |
Application Notes
The anode forms part of the envelope and requires a water jacket. Cooling supplies must start before voltages are applied. HT voltages above 7kV must be increased gradually.
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