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

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4ES8 vacuum tube outline illustration

Tube-number record

4ES8

0 archive entries

4ES8 is a tube type in the TubeDatabase archive (class: VHF Duo Triode). Recorded specifications: brand Sylvania, construction Dual triode, maximum plate voltage 130 V, and maximum plate dissipation 1.8 W. The archive does not yet hold a photographed example of this type.

BrandSylvania
ClassVHF Duo Triode
Filament4 V @ 600 mA

Construction

Primary TypeDual triode
EnvelopeGlass
Sections2

Filament / Heater

Heater NotesDesigned for series heater string applications

Absolute Maximum Ratings

Plate Voltage130 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A1 Amplifier90 V12500——15 mA
Cascode Operation180 V12500——15 mA

Application Notes

Designed for use as cascode VHF amplifiers in TV tuners.

Datasheets

Datasheet: 4ES8.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 Dissipation1.8 W
    Grid 1 Voltage-50 V
    Cathode Current22 mA
    H-C Voltage50 V

    Audio Performance

    Key Features
    • Extremely high gm
    • Low capacitances
    • Low noise
    • Semi-remote cutoff