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

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ME1404 vacuum tube outline illustration

Tube-number record

ME1404

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ME1404 is a tube type in the TubeDatabase archive (class: Subminiature Electrometer Triode). Recorded specifications: brand Mullard, construction Triode, socket B5 family, and maximum plate voltage 25 V. The archive does not yet hold a photographed example of this type.

BrandMullard
ClassSubminiature Electrometer Triode
BaseB5 family

Construction

Primary TypeTriode
EnvelopeSubminiature

Filament / Heater

MaterialDirectly heated

Absolute Maximum Ratings

Plate Voltage25 V
Cathode Current0.25 mA

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Linear Operation9 V80—20.1 mA

Application Notes

To prevent photoemission from the grid, the valve should be operated in darkness or at a low ambient light level. Avoid contamination of the glass; do not handle within 13mm of the base.

Datasheets

Datasheet: ME1404.pdf

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

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    Audio Performance

    Key Features
    • Controlled logarithmic relationship between grid and anode current
    • Low grid current (2 x 10-15A range)
    • Designed for linear and logarithmic use