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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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7AU7 vacuum tube outline illustration

Tube-number record

7AU7

0 archive entries

7AU7 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 9 Pin, 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)
Filament7 V @ 300 mA

Construction

Primary TypeDual triode
EnvelopeT-6 1/2 Glass
Base MaterialSmall Button Noval 9 Pin
Sections2

Filament / Heater

Warm-up Time11s
Heater NotesControlled warm-up for 600 mA series strings.

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A1 Amplifier100 V3100625019.511.8 mA
Class A1 Amplifier250 V220077001710.5 mA

Application Notes

Specifically designed for audio frequency amplifier or combined oscillator and mixer applications in TV receivers with 600 mA series heater strings.

Filters

0 tubes found

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
    • Controlled heater warm-up
    • Twin independent triodes
    • Low microphonics
    • Miniature size