Tube-number record
90EG4F
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ClassOscilloscope Tube
BaseCRT base (B12 family)
Filament4 V @ 1000 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater Notesa.c. or d.c.
Absolute Maximum Ratings
Plate Voltage5000 V
Audio Performance
Key Features
- Flat faced bulb
- Electrostatic focus
- Electrostatic deflection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Condition 1 | 4000 V | — | — | — | — |
| Condition 2 | 2000 V | — | — | — | — |
Application Notes
The undeflected focused spot will fall within a circle having a 6 mm radius concentric with the centre of the tube face.
Datasheets
Datasheet: 90EG4F.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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