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EF 42

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BrandPHILIPS
ClassR.F. PENTODE
BaseRimlock
Filament6.3V @ 0.33mA

Construction

Primary TypePentode
EnvelopeGlass
SectionsSingle

Filament / Heater

Heater NotesIndirect by A.C. or D.C.; parallel supply

Absolute Maximum Ratings

Plate Voltage300 V
Plate Dissipation3.5 W
Grid 2 Voltage300 V
Grid 1 Voltage-1.3 V
Cathode Current25 mA
H-C Voltage100 V

Audio Performance

Key Features
  • Wide-band amplifier
  • Indirectly heated
  • Parallel supply

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Wide-band amplifier250V90005000008510mA

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