Tube-number record
811-A
0 archive entries
811-A is a tube type in the TubeDatabase archive (class: Power Triode). Recorded specifications: construction Triode, maximum plate voltage 1500 V, and maximum plate dissipation 65 W. The archive does not yet hold a photographed example of this type.
ClassPower Triode
Construction
Primary TypeTriode
EnvelopeGlass
Sections1
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage1500 V
Plate Dissipation65 W
Grid 1 Voltage-200 V
Audio Performance
Power Output340 W
Key Features
- High-mu triode
- Directly heated cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B (Two Tubes) | 1500 V | — | — | 160 | 156 mA |
| Class C Telegraphy (ICAS) | 1500 V | — | — | — | 173 mA |
Application Notes
Used primarily in Class B audio modulators and Class C RF power amplifiers.
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