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

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9D7 vacuum tube outline illustration

Tube-number record

9D7

0 archive entries

9D7 is a tube type in the TubeDatabase archive (class: High Slope Vari-Mu Pentode). Recorded specifications: brand BRIMAR, construction Pentode, socket Miniature 7-pin (B7G), maximum plate voltage 275 V, and maximum plate dissipation 2.75 W. The archive does not yet hold a photographed example of this type.

BrandBRIMAR
ClassHigh Slope Vari-Mu Pentode
BaseMiniature 7-pin (B7G)
Filament6.3 V @ 300 mA

Construction

Primary TypePentode
EnvelopeMiniature
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage275 V
Plate Dissipation2.75 W

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Vari-mu Pentode250 V84007500003510 mA

Application Notes

Used in the I.F. stages of television and F.M. receivers using automatic gain control.

Datasheets

Datasheet: 9D7.pdf

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

Filters

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Manufacturers

Brands

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    Grid 2 Voltage275 V
    Cathode Current30 mA
    H-C Voltage250 V

    Audio Performance

    Key Features
    • High Slope
    • Vari-mu characteristic
    • Miniature envelope
    • Suitable for A.C. or A.C./D.C. receivers