TB3/750
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ClassRF Power Triode
BaseGiant 5-pin
Construction
Primary Typetriode
Envelopeglass
Sections1
Filament / Heater
Materialthoriated tungsten
Absolute Maximum Ratings
Plate Voltage4000 V
Plate Dissipation350 W
Grid 1 Voltage-900 V
Cathode Current500 mA
Audio Performance
Typical THD2.5%
Power Output1550 W
Key Features
- Direct heating
- Thoriated tungsten filament
- Class C Telegraphy
- Industrial Oscillator
- Grounded grid
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Telegraphy | 4000V | 5000 | - | 25 | 380mA |
| Class C Telegraphy | 3000V | 5000 | - | 25 | 363mA |
| Class B Modulator (per tube) | 4000V | - | - | - | 270mA |
Application Notes
In cases where maximum permissible temperatures are likely to be exceeded (above 30 MHz), low-velocity air flow is required on the anode seal and envelope bottom.
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