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

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6909 vacuum tube outline illustration

Tube-number record

6909

0 archive entries

6909 is a tube type in the TubeDatabase archive (class: Decade Counter Tube). Recorded specifications: brand SYLVANIA, construction Other / special, socket Octal, and maximum plate voltage 800 V. The archive does not yet hold a photographed example of this type.

BrandSYLVANIA
ClassDecade Counter Tube
BaseOctal

Construction

Primary TypeOther / special
EnvelopeT9
SectionsBidirectional Decade Counter

Filament / Heater

Absolute Maximum Ratings

Plate Voltage800 V
Grid 2 Voltage140 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Decade Counting400 V———0.7 mA

Application Notes

Applications include computing, scaling, counting, frequency dividing, coding, modulating, matrixing, indexing, multiplesing, addition and subtraction.

Datasheets

Datasheet: 6909.pdf

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

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    Cathode Current0.8 mA

    Audio Performance

    Key Features
    • Cold cathode
    • Bidirectional decade counter
    • Top viewed readout
    • 100,000 pulses per second
    • Individual base pins for cathodes 0, 5, 8, and 9