Tube-number record
TBH12/38
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ClassIndustrial R.F. Power Triode
Construction
Primary TypeTriode
EnvelopeMetal/Ceramic with Integral Helical Cooler
Sectionssingle
Filament / Heater
Materialthoriated tungsten
Absolute Maximum Ratings
Plate Voltage18000 V
Plate Dissipation20000 W
Grid 1 Voltage-2000 V
Cathode Current5000 mA
Audio Performance
Key Features
- Water cooled
- Integral helical cooler
- Thoriated tungsten filament
- Direct heating
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| R.F. Class C Oscillator | 12000 V | 25000 | 840 | 21 | 4500 mA |
| R.F. Class C Oscillator | 10000 V | 25000 | 840 | 21 | 4500 mA |
| R.F. Class C Oscillator | 8000 V | 25000 | 840 | 21 | 4500 mA |
Application Notes
The filament current must never exceed a peak value of 280A at any time during the initial energizing schedule. Mounting position: vertical with anode down.
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