Tube-number record
EBL31
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EBL31 is a tube type in the TubeDatabase archive (class: Double Diode Output Pentode). Recorded specifications: brand Mullard, construction Pentode, base Plastic, socket Octal, maximum plate voltage 250 V, and maximum plate dissipation 9 W. The archive does not yet hold a photographed example of this type.
BrandMullard
ClassDouble Diode Output Pentode
BaseOctal
Filament6.3 V @ 1.5 mA
Construction
Primary TypePentode
EnvelopeGlass
Base MaterialPlastic
SectionsDouble Diode Pentode
Filament / Heater
Heater NotesA.C. mains-operated
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation9 W
Grid 2 Voltage250 V
Grid 1 Voltage-1.3 V
Cathode Current55 mA
H-C Voltage50 V
Audio Performance
Typical THD10%
Key Features
- High-sensitivity
- Internal twin diodes
- Metalized envelope option
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 250 V | 9500 | 50000 | — | 36 mA |
Application Notes
High-sensitivity output pentode for use in A.C. mains-operated equipment, and combined with twin diodes.
Datasheets
Datasheet: EBL31.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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