Tube-number record
EF91
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EF91 is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: brand PHILIPS, construction Pentode, socket Miniature 7-pin (B7G), maximum plate voltage 300 V, and maximum plate dissipation 2.5 W. The archive does not yet hold a photographed example of this type.
BrandPHILIPS
ClassPentode
BaseMiniature 7-pin (B7G)
Filament6.3 V @ 0.3 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater Notesindirect by A.C. or D.C.; series or parallel supply
Absolute Maximum Ratings
Plate Voltage300 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| R.F. amplifier | 250 V | 7650 | 1000000 | 70 | 10 mA |
Application Notes
Designed for use as R.F. amplifier in HF circuits.
Datasheets
Datasheet: EF91.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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