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

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6BU8 vacuum tube outline illustration

Tube-number record

6BU8

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6BU8 is a tube type in the TubeDatabase archive (class: Twin Pentode). Recorded specifications: brand General Electric, construction Pentode, base Glass, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 1.1 W. The archive does not yet hold a photographed example of this type.

BrandGeneral Electric
ClassTwin Pentode
BaseNoval (B9A)
Filament6.3 V @ 0.3 mA

Construction

Primary TypePentode
EnvelopeT-6 1/2
Base MaterialGlass
Sections2

Filament / Heater

Heater NotesAC or DC

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Both sections operating100 V———2.2 mA
Each section separately100 V1500——2.2 mA

Datasheets

Datasheet: 6BU8.pdf

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

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    Plate Voltage
    300 V
    Plate Dissipation1.1 W
    Grid 2 Voltage150 V
    Grid 1 Voltage-50 V
    Cathode Current12 mA
    H-C Voltage200 V

    Audio Performance

    Key Features
    • Miniature multisection tube
    • Combined sync-AGC tube
    • Separate plates and No. 3 grids
    • Common screen, grid 1, and cathode