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908A

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BrandRCA
ClassOscillograph Tube
BaseMedium 7-Pin
Filament2.5V @ 2100mA

Construction

Primary TypeCRT
EnvelopeGlass
Base MaterialPlastic
SectionsSingle

Filament / Heater

Heater NotesUnipotential Cathode

Absolute Maximum Ratings

Plate Voltage1500 V
Grid 2 Voltage1500 V
Grid 1 Voltage-125 V

Audio Performance

Key Features
  • Electrostatic Focus
  • Electrostatic Deflection
  • Blue Fluorescence
  • Short Persistence Phosphor

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Operation at 1000V Anode 21000V----
Operation at 1500V Anode 21500V----

Application Notes

Brilliance and definition decrease with decreasing Anode No. 2 voltage; should not be less than 1000 volts.

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