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

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Tube-number record

L14-131GH/55

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ClassInstrument Cathode-Ray Tube
Base14-pin all-glass
Filament6.3 V @ 300 mA

Construction

Primary Type
Display / CRT
EnvelopeRectangular flat-faced
Base MaterialGlass
SectionsSplit-beam writing gun, dual viewing guns

Filament / Heater

Heater NotesWriting section: 6.3V/300mA. Viewing section: dual 6.3V/300mA heaters.

Absolute Maximum Ratings

Plate Voltage9500 V
Grid 2 Voltage2000 V
Grid 1 Voltage-200 V
H-C Voltage125 V

Audio Performance

Key Features
  • Split-beam writing gun
  • Variable persistence
  • Internal graticule
  • Metal-backed phosphor
  • Direct-view storage

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Writing Gun8500 V————
Viewing Gun7050 V———0.4 mA

Application Notes

Intended for oscilloscope applications. Scanned raster can be aligned with internal graticule by means of correction coils fitted around the tube.

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