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

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DG9-4 vacuum tube outline illustration

Tube-number record

DG9-4

0 archive entries

DG9-4 is a tube type in the TubeDatabase archive (class: Electron-ray tube). Recorded specifications: brand Philips, construction Display / CRT, and maximum plate voltage 1000 V. The archive does not yet hold a photographed example of this type.

BrandPhilips
ClassElectron-ray tube
Filament4 V @ 1 mA

Construction

Primary TypeDisplay / CRT
EnvelopeGlass
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated

Absolute Maximum Ratings

Plate Voltage1000 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Standard Operation1000 V————

Application Notes

The screen diameter of the DG 9-4 is 10 centimetres; thus the tube is not too large for use in portable oscillographs. The beam is focused by electrostatic means using an electron lens comprising several potential drops.

Datasheets

Datasheet: DG9-4.pdf

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

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    Grid 2 Voltage400 V
    Grid 1 Voltage-40 V

    Audio Performance

    Key Features
    • High deflection sensitivity
    • Very clear spot
    • Very bright trace
    • Convenient size