Tube-number record
131
0 archive entries
131 is a tube type in the TubeDatabase archive (class: Power Triode). Recorded specifications: construction Triode, socket 4-pin, maximum plate voltage 180 V, and maximum plate dissipation 2.2 W. The archive does not yet hold a photographed example of this type.
ClassPower Triode
Base4-pin
Construction
Primary TypeTriode
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage180 V
Plate Dissipation2.2 W
Cathode Current15 mA
Audio Performance
Power Output0.375 W
Key Features
- Filamentary Cathode
- Low power consumption for battery operation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 135 V | 925 | 4100 | 3.8 | 8 mA |
| Class A Amplifier | 180 V | 1025 | 3600 | 3.8 | 12.3 mA |
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