PX25
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BrandMarconi
Class25 watt Triode
Base4 pin base
Construction
Primary TypeTriode
EnvelopeGlass
Filament / Heater
Absolute Maximum Ratings
Plate Voltage500 V
Plate Dissipation25 W
Audio Performance
Power Output5 W
Key Features
- Low impedance triode
- High slope
- Domestic receivers
- Small amplifiers
- Driver valve
- Medium wavelength transmitter
- Modulator
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A | - | 7500 | 1265 | 9.5 | - |
Application Notes
Normal operating conditions in class A are shown on the curve, with load 4000 ohms, bias resistance 475 ohms, grid bias 30 volts.
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