Tube-number record
4UXP
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BrandPhilco
ClassCathode Ray Tube
BaseSpecial / none
Filament6.3 V @ 600 mA
Construction
Primary TypeMagnetic focus and magnetic deflection
EnvelopeModified C30 Exp. 4
Base MaterialSmall neck
SectionsTriode
Filament / Heater
Heater NotesStandard voltage 6.3V, operating range 5.0V to 7.0V
Absolute Maximum Ratings
Plate Voltage22000 V
Grid 2 Voltage22000 V
Grid 1 Voltage-100 V
H-C Voltage180 V
Audio Performance
Key Features
- Ultra-high resolution
- Small neck diameter
- Optical quality faceplate
- Non-browning glass
- Metal backed screen
- Essentially constant spot over 0.75 inch radius
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Grid Drive Service | 10000 V | — | — | — | 0.001 mA |
Application Notes
Designed for airborne applications where minimum weight and high resolution are desirable. Suitable for photo-oscillographic applications due to flat faceplate and blemish-free screen.
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