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Tube Database (1,270 tubes)

Other (7066), Pre (189), Power (67), Rectifier (19)
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Y-1938

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BrandGeneral Electric
ClassLow Voltage Indicator Tube
BaseMiniature

Construction

Primary TypeVacuum Cathodoluminescent Readout
EnvelopeT6-1/2
Sections7-bar segment

Filament / Heater

MaterialDirectly heated common cathode

Absolute Maximum Ratings

Plate Voltage55 V
Plate Dissipation0.1 W

Audio Performance

Key Features
  • Low drive and power levels
  • High brightness blue-green color
  • Very high speed range
  • Low persistence phosphor
  • Single plane character formation
  • No parallax problems
  • Thick film technology
  • Displays digits 0-9 and specific letters

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Typical Operation25V---0.55mA

Application Notes

The Y-1938 provides display of alphanumeric symbols at low drive and power levels through excitation of phosphor-screened segments energised by electrons emitted by a directly heated common cathode.

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