Tube-number record
EF93
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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
Plate Dissipation3 W
Grid 2 Voltage300 V
Cathode Current18 mA
H-C Voltage90 V
Audio Performance
Key Features
- Variable-mu
- R.F. amplifier
- I.F. amplifier
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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