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

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6AK4 vacuum tube outline illustration

Tube-number record

6AK4

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6AK4 is a tube type in the TubeDatabase archive (class: UHF subminiature triode). Recorded specifications: brand SYLVANIA, construction Triode, socket Subminiature, maximum plate voltage 250 V, and maximum plate dissipation 3 W. The archive does not yet hold a photographed example of this type.

BrandSYLVANIA
ClassUHF subminiature triode
BaseSubminiature
Filament6.3 V @ 150 mA

Construction

Primary TypeTriode
EnvelopeT-3
Sections1

Filament / Heater

Absolute Maximum Ratings

Plate Voltage250 V
Plate Dissipation3 W

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Single Tube200 V380053002010.5 mA

Application Notes

Provides an operating bias of approximately 6.5 volts via 510 Ohm cathode resistor. Fixed bias operation is not recommended.

Datasheets

Datasheet: 6AK4.pdf

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

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    Cathode Current
    20 mA
    H-C Voltage90 V

    Audio Performance

    Power Output0.44 W
    Key Features
    • General purpose
    • Medium mu
    • Commercial version of 6K4