Tube-number record
EL91
0 archive entries
EL91 is a tube type in the TubeDatabase archive (class: Output Pentode). Recorded specifications: brand Mullard, construction Pentode, base Glass, socket Miniature 7-pin (B7G), maximum plate voltage 250 V, and maximum plate dissipation 4 W. The archive does not yet hold a photographed example of this type.
BrandMullard
ClassOutput Pentode
BaseMiniature 7-pin (B7G)
Filament6.3 V @ 200 mA
Construction
Primary TypePentode
EnvelopeGlass Miniature
Base MaterialGlass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage250 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Connection | 250 V | 2500 | 130000 | 12 | 16 mA |
| Triode Connection (g2 connected to a) | 250 V | 2700 | 4300 | 12 | 18.3 mA |
Application Notes
Power output available during reproduction of speech and music. Sustained sine wave application results in approx 10% reduction in output due to bias re-adjustment.
Datasheets
Datasheet: EL91.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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