3R/222S
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BrandITT Standard Telephones and Cables Limited
ClassIndustrial Triode
Construction
Primary TypeTriode
EnvelopeIntegral water jacket
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage7000 V
Plate Dissipation10000 W
Grid 1 Voltage-1500 V
Cathode Current6000 mA
Audio Performance
Power Output26000 W
Key Features
- Water-cooled
- Integral water jacket
- Thoriated tungsten filament
- Vertical mounting
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Industrial Heating R.F. Oscillator | 6000V | 60000 | - | 12 | 5600mA |
Application Notes
Intended primarily for r.f. heating applications. Requires forced-air cooling of the grid and filament seals to limit temperature to below 180°C.
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