Tube-number record
21CKP4
0 archive entries
21CKP4 is a tube type in the TubeDatabase archive (class: Cathode Ray Tube). Recorded specifications: brand Thomas Electronics, Inc., construction Display / CRT, base Plastic, socket Duodecal, and maximum plate voltage 18000 V. The archive does not yet hold a photographed example of this type.
BrandThomas Electronics, Inc.
ClassCathode Ray Tube
BaseDuodecal
Filament6.3 V @ 600 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
Base MaterialPlastic
Sections1
Filament / Heater
Heater Notes6.3V @ 0.6A
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical | 16000 V | — | — | — | — |
Application Notes
The 21CKP4 is a direct-view picture tube for use in television receivers. It features a gray tinted filter glass faceplate and electrostatic focusing.
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