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

Other (3,257 tube types), Pre (2,314 tube types), Power (1,030 tube types), Rectifier (740 tube types)
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Tube-number record

D-M9-11

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BrandM-O Valve Company
ClassCathode Ray Tube
BaseCRT base (B12 family)
Filament6.3 V @ 0.6 mA

Construction

Primary TypeDisplay / CRT
Envelope9cm (3.5 inch) diameter flat faced
Base MaterialPlastic
Sections2

Filament / Heater

Heater NotesCurrent for both guns combined

Absolute Maximum Ratings

Plate Voltage1800 V
Grid 2 Voltage600 V
Grid 1 Voltage-200 V
H-C Voltage150 V

Audio Performance

Key Features
  • 9cm (3.5 inch) diameter
  • Flat faced
  • Double gun
  • Symmetrical deflection

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Each Gun1500 V———0.15 mA

Filters

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