13D3
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BrandBRIMAR
ClassDouble Triode
BaseB9A
Filament6.3V @ 0.6mA
Construction
Primary TypeMiniature
EnvelopeGlass
SectionsDouble
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation5 W
Grid 1 Voltage-75 V
Cathode Current35 mA
Audio Performance
Typical THD11.5%
Power Output6.7 W
Key Features
- Rigid structure to reduce microphony
- Stable characteristics
- Suitable as D.C. amplifier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation 1 | 100V | 2050 | 16500 | 32.5 | 3.5mA |
| Typical Operation 2 | 250V | 2300 | 14000 | 32 | 5mA |
| Push-Pull Zero Bias Class B | 250V | - | - | - | 3.9mA |
Application Notes
Particularly suitable as a D.C. amplifier due to its stable characteristics.
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