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

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8T39 vacuum tube outline illustration

Tube-number record

8T39

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8T39 is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand NEC, construction Triode, socket Coaxial, maximum plate voltage 10000 V, and maximum plate dissipation 10000 W. The archive does not yet hold a photographed example of this type.

BrandNEC
ClassTriode
BaseCoaxial

Construction

Primary TypeTriode
EnvelopeGlass/Metal (Vapour Cooled Anode)
SectionsSingle

Filament / Heater

MaterialThoriated Tungsten
Warm-up Time1s

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
RF Power Amplifier and Oscillator-Class C Telegraphy9000 V18000—402500 mA
AF Power Amplifier and Modulator-Class B8000 V18000—404000 mA

Application Notes

Designed for use as an amplifier, modulator or oscillator in AM broadcast transmitters and industrial heating services. Maximum ratings apply up to 30 Mc/s.

Datasheets

Datasheet: 8T39.pdf

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

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Brands

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    Plate Voltage10000 V
    Plate Dissipation10000 W
    Grid 1 Voltage-1000 V
    Cathode Current2700 mA

    Audio Performance

    Power Output22000 W
    Key Features
    • Vapour Cooled
    • Thoriated tungsten filament
    • High transconductance
    • Ring-sealed grid terminal
    • Low lead inductance