Tube-number record
21CKP4
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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
Plate Voltage18000 V
Grid 2 Voltage500 V
Grid 1 Voltage-125 V
H-C Voltage180 V
Audio Performance
Key Features
- Short straight electron gun
- No ion trap required
- Short neck length
- Aluminized screen
- Gray tinted faceplate
- Metal backed screen
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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