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

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9GB8 vacuum tube outline illustration

Tube-number record

9GB8

0 archive entries

9GB8 is a tube type in the TubeDatabase archive (class: Triode-Beam Tetrode). Recorded specifications: brand Siemens Edison Swan, construction Beam tetrode / beam power, socket Noval (B9A), maximum plate voltage 250 V, and maximum plate dissipation 3 W. The archive does not yet hold a photographed example of this type.

BrandSiemens Edison Swan
ClassTriode-Beam Tetrode
BaseNoval (B9A)
Filament9.4 V @ 0.3 mA

Construction

Primary TypeBeam tetrode / beam power
EnvelopeGlass
Sections2

Filament / Heater

Heater NotesIntended for use in series connected heater chains.

Absolute Maximum Ratings

Plate Voltage250 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Triode Section200 V1400—1810 mA
Tetrode Section170 V7500——10 mA

Application Notes

Intended for Video Output or Sync Separator stages of AC/DC Mains Television receivers.

Datasheets

Datasheet: 9GB8.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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    Plate Dissipation3 W
    Grid 2 Voltage250 V
    H-C Voltage150 V

    Audio Performance

    Key Features
    • High slope beam tetrode
    • Medium mu triode
    • Series heater connection