Tube-number record
TBL2/300
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TBL2/300 is a tube type in the TubeDatabase archive (class: RF Power Triode). Recorded specifications: construction Triode, maximum plate voltage 2500 V, and maximum plate dissipation 300 W. The archive does not yet hold a photographed example of this type.
ClassRF Power Triode
Construction
Primary TypeTriode
Envelopeglass
Sections1
Filament / Heater
Materialthoriated tungsten
Absolute Maximum Ratings
Plate Voltage2500 V
Plate Dissipation300 W
Grid 1 Voltage-500 V
Cathode Current400 mA
Audio Performance
Key Features
- Direct heating
- Thoriated tungsten filament
- Air cooling
- RF industrial oscillator application
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Static | 2000 V | 10000 | 3200 | 32 | 150 mA |
| RF Class C Industrial Oscillator (Full-wave) | 1750 V | — | — | — | 340 mA |
| RF Class C Industrial Oscillator (Self-rectification) | 1750 V | — | — | — | 185 mA |
Application Notes
Generally it will be necessary to direct an air flow to the centre filament seal.
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