811A
0 Tubes in archive
BrandRCA
ClassPower Triode
BaseJEDEC No. A4-10
Construction
Primary TypeTriode
EnvelopeST19
Base MaterialMicanol
Sections1
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage1500 V
Plate Dissipation65 W
Grid 1 Voltage-200 V
Cathode Current175 mA
Audio Performance
Key Features
- Thoriated Tungsten Filament
- High Amplification Factor
- Zero-bias Class B operation
- CCS and ICAS ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B AF Power Amplifier (Two Tubes, ICAS) | 1500V | - | - | 160 | 32mA |
| Class C Telegraphy (ICAS) | 1500V | - | - | 160 | 173mA |
Application Notes
The 811A is not recommended for oscillator service in applications involving wide variations in load; the 812A is preferred for such uses.
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