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Tube Database (7,341 tube types · 1,270 archive entries)

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EL85 vacuum tube outline illustration

Tube-number record

EL85

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EL85 is a tube type in the TubeDatabase archive (class: Output Pentode). Recorded specifications: brand Mullard, construction Pentode, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 6 W. The archive does not yet hold a photographed example of this type.

BrandMullard
ClassOutput Pentode
BaseNoval (B9A)
Filament6.3 V @ 200 mA

Construction

Primary TypePentode
EnvelopeGlass
Sectionssingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage300 V
Plate Dissipation6 W

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A Single Valve200 V320090000—22.5 mA
Class A Single Valve250 V3100100000—24 mA
Class AB Push-Pull250 V—12000—40 mA

Datasheets

Datasheet: EL85.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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Brands

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    Grid 2 Voltage
    300 V
    Grid 1 Voltage-100 V
    Cathode Current35 mA
    H-C Voltage100 V

    Audio Performance

    Typical THD10%
    Power Output2.55 W
    Key Features
    • Mobile equipment application
    • RF amplifier up to 120Mc/s
    • Audio frequency output valve
    • 6W anode dissipation