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

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4069 vacuum tube outline illustration

Tube-number record

4069

0 archive entries

4069 is a tube type in the TubeDatabase archive (class: Electrometer Triode). Recorded specifications: brand Philips, construction Triode, socket Subminiature, and maximum plate voltage 25 V. The archive does not yet hold a photographed example of this type.

BrandPhilips
ClassElectrometer Triode
BaseSubminiature

Construction

Primary TypeTriode
EnvelopeSubminiature
SectionsSingle

Filament / Heater

MaterialDirectly Heated

Absolute Maximum Ratings

Plate Voltage25 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Linear9 V80—20.1 mA

Application Notes

To prevent photo emission from the grid, the tube should be operated in darkness or at a low ambient light level. To avoid excessive drift, the filament voltage must be applied before the anode voltage. Soldered connections must be at least 13 mm from the seal.

Datasheets

Datasheet: 4069.pdf

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

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    Cathode Current0.25 mA

    Audio Performance

    Key Features
    • Low grid current 2x10^-13 A
    • Linear and logarithmic use
    • Controlled logarithmic relationship between grid current and anode current