Tube-number record
9QP4
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BrandGeneral Electric
ClassCathode-Ray Tube
BaseDuodecal
Filament4.7 V @ 300 mA
Construction
Primary TypeRectangular Glass
EnvelopeGlass
Base MaterialSmall-shell Duodecal
SectionsSingle
Filament / Heater
Heater NotesLow-current heater for series-string operation
Absolute Maximum Ratings
Plate Voltage6800 V
Grid 2 Voltage300 V
Grid 1 Voltage100 V
H-C Voltage200 V
Audio Performance
Key Features
- Small size
- Light weight
- Low-current heater
- Series-string operation
- Ion-trap gun
- Spherical faceplate
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Cathode-Drive Service | 5500 V | — | — | — | — |
Application Notes
Especially designed for use in small, light weight, portable television receivers featuring circuit simplification and power reduction possible in series-string service.
Datasheets
Datasheet: 9QP4.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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