A 425
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BrandPhilips
ClassTriode
BaseA 32
Construction
Primary TypeTriode
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage200 V
Audio Performance
Key Features
- Miniwatt series
- Resistance coupling
- Detector function
- L.F. amplifier function
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Resistance coupling (0.3 M.Ohm load) | - | 1200 | 80000 | 25 | 0.25mA |
| Resistance coupling (1 M.Ohm load) | - | - | 250000 | 25 | 0.1mA |
Application Notes
Specifically designed for use as a detector or low-frequency amplifier with resistance coupling.
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