Tube-number record
3EWI
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ClassOscilloscope Tube
BaseDuodecal
Filament4 V @ 1 mA
Construction
Primary TypeDisplay / 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
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| PDA Operation 1 | 2000 V | — | — | — | — |
| PDA Operation 2 | 1300 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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