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Tube-number record

3EY1

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ClassOscilloscope Tube
BaseCRT base (B12 family)
Filament4 V @ 1000 mA

Construction

Primary TypeElectrostatic Focus, Electrostatic Deflection
Envelope70 mm Diameter Bulb
SectionsSingle

Filament / Heater

Heater Notesa.c. or d.c.

Absolute Maximum Ratings

Plate Voltage2500 V
Grid 1 Voltage-145 V

Audio Performance

Key Features
  • Electrostatic Focus
  • Electrostatic Deflection
  • Yellow Afterglow
  • Post Deflector Accelerator

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Post Deflector Accelerator Condition 12000 V————
Post Deflector Accelerator Condition 21300 V————

Application Notes

The undeflected focused spot will fall within a circle having a 7 mm. radius concentric with the centre of the tube face.

Datasheets

Datasheet: 3EY1.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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