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

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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Tube-number record

3EWI

0 archive entries

ClassOscilloscope Tube
BaseDuodecal
Filament4 V @ 1 mA

Construction

Primary Type
Display / CRT
EnvelopeGlass
Base MaterialPlastic
SectionsSingle

Filament / Heater

Heater Notesa.c. or d.c.

Absolute Maximum Ratings

Plate Voltage2500 V

Audio Performance

Key Features
  • Electrostatic Focus
  • Electrostatic Deflection
  • Post Deflector Accelerator (P.D.A.)
  • White Fluorescence
  • Short Persistence

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
PDA Operation 12000 V————
PDA Operation 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. Trace angle is 90° ± 3°.

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