Tube-number record
BTL 1-1
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BrandBrown Boveri
ClassTransmitting Triode
Construction
Primary TypeTriode
EnvelopeGlass/Metal
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage4000 V
Plate Dissipation1000 W
Grid 1 Voltage-500 V
Cathode Current700 mA
Audio Performance
Power Output1900 W
Key Features
- Air-cooled
- Directly heated
- Thoriated tungsten filament
- Forced air cooling
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C RF Amplifier Unmodulated | 4000 V | 12000 | 2333 | 28 | 600 mA |
| Class C RF Amplifier Anode Modulated | 3000 V | 12000 | 2333 | 28 | 500 mA |
| Class B AF Power Amplifier (Push-Pull, per tube) | 4000 V | 12000 | 2333 | 28 |
Application Notes
RF and AF amplifier in FM, TV, and SW transmitters. Suitable for industrial oscillators.
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