P.A.1
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BrandBRIMAR
ClassPower Triode
Base5-pin
Filament4V @ 1000mA
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater Notes4.0 volts +/- 5%
Absolute Maximum Ratings
Plate Voltage200 V
Cathode Current50 mA
Audio Performance
Key Features
- Indirectly heated
- High sensitivity
- Moving coil speaker driver
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Measured at Eg=0 | 100V | 12000 | 1050 | 12.6 | - |
| Typical Operation | 100V | - | - | - | 23mA |
| Typical Operation | 150V | - | - | - | 35mA |
| Typical Operation | 200V | - | - | - | 40mA |
Application Notes
Grid bias is most conveniently derived by including a resistance in the cathode lead of approximately 260 ohms. This should be shunted by a condenser of at least 4 mfd.
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