KF3
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BrandPhilips
ClassPENTODE with variable mu
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialDirectly heated
Absolute Maximum Ratings
Plate Voltage135 V
Plate Dissipation0.5 W
Grid 2 Voltage135 V
Grid 1 Voltage-2 V
Cathode Current5 mA
Audio Performance
Key Features
- Variable mu
- Battery operated
- High Frequency amplifier
- Intermediate Frequency amplifier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Operating characteristics (Va 90V) | 90V | 650 | 2000000 | 1000 | 1mA |
| Operating characteristics (Va 135V) | 135V | 850 | 2300000 | 850 | 2mA |
Application Notes
Pentode with variable mu for use as H.F. and I.F. amplifier. Directly heated by battery in parallel supply.
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