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

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Tube-number record

31C14

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31C14 is a tube type in the TubeDatabase archive (class: Cathode Ray Tube). Recorded specifications: brand Ediswan, construction Display / CRT, base Duodecal, socket Duodecal, and maximum plate voltage 12500 V. The archive does not yet hold a photographed example of this type.

BrandEdiswan
ClassCathode Ray Tube
BaseDuodecal
Filament6.3 V @ 600 mA

Construction

Primary TypeDisplay / CRT
Envelope6 inch diameter flat face, aluminised
Base MaterialDuodecal
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Radio D.F. Compass Operation9500 V———0.15 mA

Application Notes

A resistance should be inserted in the anode circuit to limit discharge current to 100mA max in event of flash-over.

Datasheets

Datasheet: 31C14.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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Manufacturers

Brands

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    Plate Voltage12500 V
    H-C Voltage150 V

    Audio Performance

    Key Features
    • Screen type T1 (green trace, medium persistence)
    • Internal compass scale uniformly graduated
    • Reduced specular reflection face treatment
    • Aluminised