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DG9-4

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BrandPhilips
ClassElectron-ray tube
Filament4V @ 1mA

Construction

Primary TypeCathode Ray Tube (CRT)
EnvelopeGlass
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated

Absolute Maximum Ratings

Plate Voltage1000 V
Grid 2 Voltage400 V
Grid 1 Voltage-40 V

Audio Performance

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

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Standard Operation1000V----

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.

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