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

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Tube-number record

M31-131W

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BrandPhilips
ClassMonitor Tube
BaseCRT base (B8H)
Filament6.3 V @ 300 mA

Construction

Primary TypeDisplay / CRT
Envelope31 cm-diagonal rectangular
Sections1

Filament / Heater

Heater NotesIndirect by a. c. or d. c. ;parallel supply

Absolute Maximum Ratings

Plate Voltage18000 V
Grid 2 Voltage800 V
Grid 1 Voltage-150 V
H-C Voltage250 V

Audio Performance

Key Features
  • 900 lines resolution
  • Metal backed phosphor
  • Integral protection
  • Electrostatic focusing
  • Magnetic deflection

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Monitor Operation16000 V———0.05 mA

Application Notes

Primarily intended for use as a monitor or display tube. The tube marking and warning labels are on the side of the cone opposite the final accelerator contact.

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