EF 43
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BrandPhilips
ClassPentode
BaseRIMLOCK
Filament6.3V @ 330mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirect heating; parallel supply
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation3.75 W
Grid 2 Voltage250 V
Grid 1 Voltage-1.3 V
Cathode Current20 mA
H-C Voltage100 V
Audio Performance
Key Features
- Variable mutual conductance
- Wide-band amplifier
- Rimlock base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| R.F. or I.F. amplifier | 250V | 6400 | 500000 | - | 15mA |
Application Notes
R.F. pentode with variable mutual conductance for use as wide-band amplifier.
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