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90EY4

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ClassOscilloscope Tube
BaseB12D
Filament4V @ 1000mA

Construction

Primary TypeCRT
EnvelopeGlass
Base MaterialPlastic/Bakelite
SectionsSingle

Filament / Heater

Heater NotesAC or DC

Absolute Maximum Ratings

Plate Voltage5000 V

Audio Performance

Key Features
  • Electrostatic Focus
  • Electrostatic Deflection
  • Yellow Fluorescence
  • Long Persistence

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Condition 14000V----
Condition 22000V----

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