Tube-number record
CAT2/1
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BrandMarconi
ClassTransmitting Triode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeMetal/Water-cooled
Base MaterialMetal
SectionsSingle
Filament / Heater
MaterialPure Tungsten
Absolute Maximum Ratings
Plate Voltage10000 V
Plate Dissipation20000 W
Audio Performance
Key Features
- Water-cooled anode
- Pure tungsten filament
- VHF operation up to 100 Mc/s
- Forced air cooling for seals
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| HF Power Amplifier Class C Telegraphy | 10000 V | 20000 | 1050 | 21 | 5600 mA |
Application Notes
Anode voltage must be reduced at high frequencies: 100% at 50 Mc/s, 68% at 75 Mc/s, and 60% at 100 Mc/s. Filament voltage should be reduced to half during standby periods longer than 5 minutes.
Datasheets
Datasheet: CAT21.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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