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BrandRCA
ClassTwin High-Mu Triode Class B Power Amplifier
BaseSmall 6-Pin
Construction
Primary TypeTriode
EnvelopeST-12
Sections2
Filament / Heater
Absolute Maximum Ratings
Plate Voltage135 V
Cathode Current50 mA
Audio Performance
Power Output2.1 W
Key Features
- Two high-mu triodes in one bulb
- Designed for Class B operation
- Battery-operated receivers
- Capable of 2 watts output
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B (Negative Bias) | 135V | - | - | - | 0.5mA |
| Class B (Negative Bias) | 135V | - | - | - | 2mA |
| Class B (Zero Bias) | 135V | - | - | - | 5mA |
Application Notes
The triode units have separate external terminals for all electrodes except the filaments. It can be operated with zero grid bias or negative grid bias to conserve battery drain.
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