Tube-number record
21CDP4
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BrandTUNG-SOL
ClassCathode Ray Tube
BaseDuodecal
Filament6.3 V @ 450 mA
Construction
Primary TypeDisplay / CRT
EnvelopeRectangular Glass
Base MaterialSmall Shell Duodecal 6-Pin
Sections1
Filament / Heater
Heater NotesWarm-up time 11.0 seconds
Absolute Maximum Ratings
Plate Voltage22000 V
Grid 2 Voltage550 V
Grid 1 Voltage-155 V
H-C Voltage450 V
Audio Performance
Key Features
- Magnetic Deflection
- Electrostatic Focus
- Unipotential Cathode
- Gray Filter Faceplate
- External Conductive Coating
- Aluminized Screen (21CDP4A only)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 16000 V | — | — | — | — |
Application Notes
The 21CDP4 and 21CDP4A are direct view picture tubes designed for television applications. They are identical except for the aluminized screen on the 21CDP4A.
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