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Z71U

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BrandPhilips
ClassTrigger Tube
BaseSubminiature

Construction

Primary TypeCold-cathode
EnvelopeSubminiature
Base MaterialGlass
SectionsTwo starters

Filament / Heater

Absolute Maximum Ratings

Plate Voltage165 V
Grid 1 Voltage90 V
Cathode Current7 mA

Audio Performance

Key Features
  • Cold-cathode
  • Two starters
  • Subminiature
  • Low impedance for audio frequencies

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Continuous Service63V-499-5mA
Intermittent Service63V-499-8mA

Application Notes

Intended for use in D.C. supplied circuits, counting and switching circuits, automatic telephone exchanges, and timers. Requires 10 lux ambient light for stable operation; avoid direct sunlight.

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