EF 41
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BrandPHILIPS
ClassVariable-mu Pentode
BaseRimlock
Filament6.3V @ 0.24mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirect heating by A.C. or D.C.; parallel supply
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation2 W
Grid 2 Voltage300 V
Grid 1 Voltage-1.3 V
Cathode Current10 mA
H-C Voltage100 V
Audio Performance
Key Features
- Variable mutual conductance
- R.F. and I.F. amplifier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| R.F. and I.F. amplifier | 250V | 2200 | 1000000 | 18 | 6mA |
Application Notes
PENTODE with variable mutual conductance for use as R.F. and I.F. amplifier.
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