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

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Tube-number record

7438

0 archive entries

7438 is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: brand Mullard, construction Pentode, socket B8D / B8F, maximum plate voltage 190 V, and maximum plate dissipation 1 W. The archive does not yet hold a photographed example of this type.

BrandMullard
ClassPentode
BaseB8D / B8F
Filament6.3 V @ 175 mA

Construction

Primary TypePentode
EnvelopeT-3
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage190 V
Plate Dissipation1 W

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Typical Operation100 V2500—343 mA

Application Notes

For use in guided weapons.

Datasheets

Datasheet: 7438.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 2 Voltage
    190 V
    Grid 1 Voltage-50 V
    Cathode Current12 mA
    H-C Voltage100 V

    Audio Performance

    Key Features
    • Reliable
    • Subminiature
    • Short suppressor base pentode
    • Flying leads