90ED4P
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ClassOscilloscope Tube
BaseB12D
Filament4V @ 1000mA
Construction
Primary TypeElectrostatic
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage4000 V
Grid 1 Voltage-80 V
Audio Performance
Key Features
- Electrostatic Focus
- Electrostatic Deflection
- Post Deflector Accelerator
- Blue fluorescence
- Long persistence afterglow
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Post Deflector Accelerator Operation | 2000V | - | - | - | - |
Application Notes
The angle between the trace produced by X and Y plates is 90° ± 3°. Undeflected focused spot falls within a circle of 6mm radius from the centre.
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