B 217
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BrandPhilips
ClassTriode
BaseB4
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialOxide-coated
Absolute Maximum Ratings
Plate Voltage150 V
Plate Dissipation0.9 W
Grid 1 Voltage-0.4 V
Cathode Current10 mA
Audio Performance
Key Features
- Detector with transformer coupling
- L.F. amplifier with transformer coupling
- Oscillator
- Driver valve for class B amplifier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Normal | 150V | 1300 | 13000 | 17 | 4mA |
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