Tube-number record
21DWP4
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BrandWestinghouse
ClassTelevision Picture Tube
BaseMiniature 7-pin (B7G)
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
EnvelopeRectangular Glass
Base MaterialGlass
Sections1
Filament / Heater
Heater NotesCoated Unipotential Cathode
Absolute Maximum Ratings
Plate Voltage18000 V
Grid 2 Voltage500 V
Grid 1 Voltage-140 V
H-C Voltage180 V
Audio Performance
Key Features
- Aluminized
- Neutral Gray Glass
- External Conductive Coating
- Spherical Faceplate
- No Ion Trap
- Short Electron Gun
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical | 14000 V | — | — | — | — |
Application Notes
Television picture tube featuring a 110-degree deflection angle and low-voltage electrostatic focus. Shielding for x-ray radiation may be needed when operating above 16 kilovolts.
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