Tube-number record
9WP4
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BrandRCA
ClassPicture Tube
BaseMiniature 7-pin (B7G)
Filament12 V @ 78.7 mA
Construction
Primary TypeDisplay / CRT
EnvelopeFilterglass
SectionsSingle
Filament / Heater
Heater NotesWarm-Up Time: 11 seconds
Absolute Maximum Ratings
Plate Voltage12000 V
Grid 2 Voltage250 V
Grid 1 Voltage-155 V
H-C Voltage200 V
Audio Performance
Key Features
- Pan-O-Ply Type
- Aluminized Screen
- No Ion-Trap Magnet Required
- Low Grid No. 2 Voltage Focus
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Cathode-Drive Service | 9000 V | — | — | — | — |
Application Notes
Voltages are positive with respect to grid No.1 in cathode-drive service typical operation.
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