Tube-number record
EF 42
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BrandPHILIPS
ClassR.F. PENTODE
BaseRimlock
Filament6.3 V @ 0.33 mA
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
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Wide-band amplifier | 250 V | 9000 | 500000 | 85 | 10 mA |
Datasheets
Datasheet: EF42.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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