Tube-number record
9QP4-A
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BrandGeneral Electric
ClassCathode Ray Tube
BaseDuodecal
Filament4.7 V @ 300 mA
Construction
Primary TypeOther / special
EnvelopeGlass
SectionsSingle gun with Ion-trap
Filament / Heater
Warm-up Time11s
Heater NotesSeries-string operation
Absolute Maximum Ratings
Plate Voltage6800 V
Grid 2 Voltage300 V
H-C Voltage350 V
Audio Performance
Key Features
- Electrostatic Focus
- Magnetic Deflection
- 70 Degree Deflection Angle
- Ion-trap Gun
- Short Persistence
- Lightweight
- Low Current Heater
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Cathode-Drive-Service | 5500 V | — | — | — | — |
Application Notes
The 9QP4-A is designed for small, lightweight portable television receivers and features a low current heater for series-string operation.
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