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

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4GX7 vacuum tube outline illustration

Tube-number record

4GX7

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4GX7 is a tube type in the TubeDatabase archive (class: Triode & Frame-grid Pentode Converter). Recorded specifications: brand Westinghouse, construction Multi-section, base Glass, socket Noval (B9A), maximum plate voltage 275 V, and maximum plate dissipation 2.2 W. The archive does not yet hold a photographed example of this type.

BrandWestinghouse
ClassTriode & Frame-grid Pentode Converter
BaseNoval (B9A)
Filament4.2 V @ 0.6 mA

Construction

Primary TypeMulti-section
EnvelopeT-6 1/2
Base MaterialGlass
SectionsTriode, Pentode

Filament / Heater

Heater NotesControlled heater warm-up time

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Triode Unit125 V850047004013 mA
Pentode Unit125 V11000200000—8 mA

Application Notes

Designed for oscillator-mixer service in V.H.F. television tuners.

Datasheets

Datasheet: 4GX7.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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    Plate Voltage275 V
    Plate Dissipation2.2 W
    Grid 2 Voltage275 V
    Grid 1 Voltage-40 V
    Cathode Current20 mA
    H-C Voltage200 V

    Audio Performance

    Key Features
    • Frame-grid pentode
    • Sharp-cutoff
    • Low grid-to-plate capacitance
    • Controlled heater warm-up time