EBC 81
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BrandPhilips
ClassDouble Diode-Triode
BaseNoval
Filament6.3V @ 230mA
Construction
Primary TypeDouble Diode-Triode
EnvelopeGlass
Sections3
Filament / Heater
Heater NotesIndirect heating, A.C. or D.C., parallel supply
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation0.5 W
Grid 1 Voltage-1.3 V
Cathode Current5 mA
H-C Voltage100 V
Audio Performance
Key Features
- Low microphony
- Double diode for detection
- Triode for A.F. amplification
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode section | 250V | 1200 | 58000 | 70 | 1mA |
Application Notes
Can be used without special precautions against microphonic effect for input voltages > 10mV for 50mW output.
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