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

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8431 vacuum tube outline illustration

Tube-number record

8431

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8431 is a tube type in the TubeDatabase archive (class: Double Triode). Recorded specifications: brand Sylvania, construction Dual triode, base Miniature Button 9-Pin, socket Noval (B9A), maximum plate voltage 200 V, and maximum plate dissipation 3.5 W. The archive does not yet hold a photographed example of this type.

BrandSylvania
ClassDouble Triode
BaseNoval (B9A)
Filament12.6 V @ 180 mA

Construction

Primary TypeDual triode
EnvelopeT-6 1/2
Base MaterialMiniature Button 9-Pin
Sections2

Filament / Heater

Heater NotesParallel Operation

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A1 Amplifier90 V12500—3315 mA
Class C RF Doubler to 175 Mc160 V—33000—26 mA

Application Notes

Rating values apply specifically to Sonobuoy and other battery applications where power output is paramount and long life is of lesser importance. Subjected to 500G impact acceleration test.

Datasheets

Datasheet: 8431.pdf

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

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    Plate Voltage200 V
    Plate Dissipation3.5 W
    Grid 1 Voltage-75 V
    Cathode Current35 mA
    H-C Voltage200 V

    Audio Performance

    Power Output1 W
    Key Features
    • Medium mu
    • Designed for Continuous Class C Amplifier Service
    • Optimized for Sonobuoy and battery applications
    • High impact acceleration rating (500 G)