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

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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9AU7 vacuum tube outline illustration

Tube-number record

9AU7

0 archive entries

9AU7 is a tube type in the TubeDatabase archive (class: TWIN TRIODE). Recorded specifications: brand TUNG-SOL, year 1962, construction Dual triode, base SMALL BUTTON NOVAL, socket Noval (B9A), maximum plate voltage 330 V, and maximum plate dissipation 2.75 W. The archive does not yet hold a photographed example of this type.

BrandTUNG-SOL
ClassTWIN TRIODE
BaseNoval (B9A)
Filament9.4 V @ 225 mA

Construction

Primary TypeDual triode
EnvelopeGLASS BULB
Base MaterialSMALL BUTTON NOVAL
Sections2

Filament / Heater

Warm-up Time11s
Heater NotesControlled warm-up characteristics for series heater operation.

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
CLASS A1 AMPLIFIER - EACH UNIT100 V3100625019.511.8 mA
CLASS A1 AMPLIFIER - EACH UNIT250 V220077001710.5 mA

Application Notes

Specifically designed for audio frequency amplifier or combined oscillator and mixer applications in 450 MA series heater television receivers.

Filters

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Manufacturers

Brands

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    Absolute Maximum Ratings

    Plate Voltage330 V
    Plate Dissipation2.75 W
    Cathode Current22 mA
    H-C Voltage200 V

    Audio Performance

    Key Features
    • UNIPOTENTIAL CATHODE
    • 9 PIN MINIATURE CONSTRUCTION
    • CONTROLLED HEATER WARM-UP