B240
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BrandPhilips Miniwatt
ClassDuotriode
BaseB6
Construction
Primary TypeTriode
EnvelopeGlass
SectionsDouble
Filament / Heater
Absolute Maximum Ratings
Plate Voltage150 V
Audio Performance
Typical THD6%
Power Output1.25 W
Key Features
- Zero-bias class B operation
- Low heater current
- Proportional current consumption
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B | 150V | - | - | - | 8mA |
| Class B | 120V | - | - | - | 4.5mA |
Application Notes
Requires driver stage (e.g. B217) via transformer with 3:(1+1) ratio. Not suitable for resistance coupling due to grid current.
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