Tube-number record
T 380-1
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BrandBrown Boveri
ClassTriode
Base5-pin
Construction
Primary TypeTriode
EnvelopeGlass
Sections1
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage4000 V
Plate Dissipation380 W
Grid 1 Voltage-400 V
Cathode Current500 mA
Audio Performance
Key Features
- Radiation-cooled
- Thoriated tungsten filament
- Directly heated
- Pulse operation capability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C RF Unmodulated, Grounded Cathode | 4000 V | 8000 | — | 28 | 370 mA |
| Class C RF Anode Modulated, Grounded Cathode | 3200 V | 8000 | — | 28 | 260 mA |
Application Notes
AF and RF amplifier (shortwave transmitters) and industrial applications such as HF generators for plastic welding and pulse operation.
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