CAT9
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BrandMarconi
ClassTriode
Construction
Primary TypeHF Power Amplifier and Oscillator
EnvelopeWater-cooled anode
Base MaterialMetal/Glass
SectionsSingle
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Plate Voltage15000 V
Plate Dissipation18000 W
Audio Performance
Key Features
- Water-cooled anode
- Transmitting triode
- Flexible grid connector
- Forced air cooling for seals
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Telegraphy (Mode 1) | 15000V | 10000 | 4500 | 45 | 2650mA |
| Class C Telegraphy (Mode 2) | 12000V | 10000 | 4500 | 45 | 2600mA |
| Class C Anode Modulated | 12000V | 10000 | 4500 | 45 | 1050mA |
Application Notes
The anode forms part of the envelope and must be fitted with a specially designed water jacket. All cooling supplies must be started before the application of any supply voltages. Water flow should not be less than 4.5 gallons per minute.
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