Tube-number record
EF93
0 archive entries
EF93 is a tube type in the TubeDatabase archive (class: Variable-mu pentode). Recorded specifications: brand Mullard, construction Pentode, socket Miniature 7-pin (B7G), maximum plate voltage 300 V, and maximum plate dissipation 3 W. The archive does not yet hold a photographed example of this type.
BrandMullard
ClassVariable-mu pentode
BaseMiniature 7-pin (B7G)
Filament6.3 V @ 300 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesSuitable for series or parallel operation, a.c. or d.c.
Absolute Maximum Ratings
Plate Voltage300 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Operation 1 | 100 V | 4300 | 250000 | — | 10.8 mA |
| Operation 2 | 250 V | 4400 | 1500000 | — | 11 mA |
Application Notes
Variable-mu pentode for use as r.f. or i.f. amplifier.
Datasheets
Datasheet: EF93.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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