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

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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Y-1938 vacuum tube outline illustration

Tube-number record

Y-1938

0 archive entries

Y-1938 is a tube type in the TubeDatabase archive (class: Low Voltage Indicator Tube). Recorded specifications: brand General Electric, construction Other / special, socket Miniature 7-pin (B7G), maximum plate voltage 55 V, and maximum plate dissipation 0.1 W. The archive does not yet hold a photographed example of this type.

BrandGeneral Electric
ClassLow Voltage Indicator Tube
BaseMiniature 7-pin (B7G)

Construction

Primary TypeOther / special
EnvelopeT6-1/2
Sections7-bar segment

Filament / Heater

MaterialDirectly heated common cathode

Absolute Maximum Ratings

Plate Voltage55 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Typical Operation25 V———0.55 mA

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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    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