TBH12/25
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ClassIndustrial R.F. Power Triode
BaseDirectly connected with integral helical cooler
Construction
Primary TypeTriode
EnvelopeMetal-glass, water cooled
Base MaterialMetal
SectionsSingle
Filament / Heater
Materialthoriated tungsten
Absolute Maximum Ratings
Plate Voltage13000 V
Plate Dissipation20000 W
Grid 1 Voltage-1500 V
Cathode Current4800 mA
Audio Performance
Key Features
- Water cooled
- Integral helical cooler
- Direct heating
- Thoriated tungsten filament
- Industrial R.F. use
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| R.F. Class C oscillator (Three phase half-wave rectifier) | 12000V | 20000 | - | 34 | 3200mA |
| R.F. Class C oscillator (Three phase half-wave rectifier) | 10000V | 20000 | - | 34 | 3200mA |
| R.F. Class C oscillator (Three phase half-wave rectifier) | 8000V | 20000 | - | 34 | 3200mA |
Application Notes
The filament current must never exceed a peak value of 210 A instantaneously at any time during the initial energizing schedule. Low velocity air flow to the seals is generally required.
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