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BrandWestinghouse
ClassIonization Vacuum Gauge Triode

Construction

Primary TypeTriode
EnvelopeNonex Code 7720
Sections1 (Dual filament construction)

Filament / Heater

MaterialPure Tungsten

Absolute Maximum Ratings

Plate Voltage-100 V
Plate Dissipation100 W
Grid 1 Voltage600 V

Audio Performance

Key Features
  • Special triode designed for ionization vacuum gauge service
  • Two Filaments are supplied, one of which is a spare
  • Measures pressures as low as 10-7 mm Hg

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Ionization Gauge Service-30V----

Application Notes

To outgas the ionization gauge, the two filaments may be connected either in series or parallel. Connect ion collector to grid and attach to +500 volts dc. Adjust emission current by raising filament voltage to give the desired operating condition to outgas the elements.

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