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

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EC71 vacuum tube outline illustration

Tube-number record

EC71

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EC71 is a tube type in the TubeDatabase archive (class: Subminiature U.H.F. Triode). Recorded specifications: brand Mullard, construction Triode, socket B8D / B8F, maximum plate voltage 165 V, and maximum plate dissipation 3.3 W. The archive does not yet hold a photographed example of this type.

BrandMullard
ClassSubminiature U.H.F. Triode
BaseB8D / B8F
Filament6.3 V @ 150 mA

Construction

Primary TypeTriode
EnvelopeSubminiature
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage165 V
Plate Dissipation3.3 W

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Typical100 V57454700278.5 mA

Application Notes

Direct soldered connections to the leads must be at least 5mm from the seal. Cooling may be required via metal clip heat sink to ensure satisfactory life.

Datasheets

Datasheet: EC71.pdf

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

Filters

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Manufacturers

Brands

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    Grid 1 Voltage-55 V
    Cathode Current22 mA
    H-C Voltage200 V

    Audio Performance

    Key Features
    • Medium-mu triode
    • Subminiature construction
    • Intended for use as an oscillator at frequencies up to 500Mc/s