Tube-number record
21DVP4
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BrandWestinghouse
ClassTelevision Picture Tube
BaseDuodecal
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
EnvelopeRectangular Glass
Base MaterialGlass
Sections1
Filament / Heater
Heater NotesControlled warm-up time for service in series-heater string television receivers.
Absolute Maximum Ratings
Plate Voltage20000 V
Grid 2 Voltage500 V
Grid 1 Voltage-140 V
H-C Voltage180 V
Audio Performance
Key Features
- Aluminized screen
- Controlled heater warm-up time
- 90 degree magnetic deflection
- Internal conductive coating
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation (14kV) | 14000 V | — | — | — | 0.1 mA |
| Typical Operation (18kV) | 18000 V | — | — | — | 0.1 mA |
Application Notes
Shielding for x-ray radiation may be needed if operating at voltages as high as 22 kilovolts. Protective resistance in Grid 2 and Grid 4 circuits is advisable.
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