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

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6FM8 vacuum tube outline illustration

Tube-number record

6FM8

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6FM8 is a tube type in the TubeDatabase archive (class: Duplex-Diode High-Mu Triode). Recorded specifications: brand General Electric, construction Multi-section, base Glass, socket Noval (B9A), maximum plate voltage 330 V, and maximum plate dissipation 1.1 W. The archive does not yet hold a photographed example of this type.

BrandGeneral Electric
ClassDuplex-Diode High-Mu Triode
BaseNoval (B9A)
Filament6.3 V @ 450 mA

Construction

Primary TypeMulti-section
EnvelopeT-6 1/2
Base MaterialGlass
Sections3

Filament / Heater

Heater NotesAC or DC

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A Amplifier250 V120058000701 mA

Datasheets

Datasheet: 6FM8.pdf

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

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    Plate Voltage
    330 V
    Plate Dissipation1.1 W
    Cathode Current5 mA
    H-C Voltage200 V

    Audio Performance

    Key Features
    • Separate cathodes for each diode and triode section
    • Designed for FM detector and AF voltage amplifier applications