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

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6947 vacuum tube outline illustration

Tube-number record

6947

0 archive entries

6947 is a tube type in the TubeDatabase archive (class: Medium-Mu Double Triode). Recorded specifications: brand Sylvania, construction Dual triode, base Coated Unipotential, socket Subminiature, maximum plate voltage 250 V, and maximum plate dissipation 0.75 W. The archive does not yet hold a photographed example of this type.

BrandSylvania
ClassMedium-Mu Double Triode
BaseSubminiature
Filament6.3 V @ 350 mA

Construction

Primary TypeDual triode
EnvelopeT-3 Bulb
Base MaterialCoated Unipotential
Sections2

Filament / Heater

Heater NotesHeater current 350 mA at 6.3 V

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Standard Operation (Each Section)150 V4000—356.5 mA

Application Notes

Designed for general purpose applications in guided-missile service where vibration, shock and high temperatures are encountered.

Datasheets

Datasheet: 6947.pdf

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

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    Plate Voltage250 V
    Plate Dissipation0.75 W
    Grid 1 Voltage-55 V
    Cathode Current13 mA
    H-C Voltage200 V

    Audio Performance

    Key Features
    • Guided-missile service
    • Reliable operation under severe mechanical shock
    • Extraordinary freedom from interelement short circuits
    • High resistance to interelement leakage