Tube-number record
21BCP4
0 Tubes in archive
BrandGeneral Electric
ClassCathode-Ray Tube
BaseDuodecal
Filament6.3 V @ 600 mA
Construction
Primary TypeRectangular Glass
EnvelopeGlass
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage18000 V
Grid 2 Voltage500 V
Grid 1 Voltage-125 V
H-C Voltage410 V
Audio Performance
Key Features
- No ion-trap magnet required
- Aluminized screen
- Gray faceplate
- External conductive coating
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical | 16000 V | — | — | — | — |
Application Notes
The 21BCP4 is a rectangular all-glass picture tube for direct-view television reception. It employs electrostatic focusing and magnetic deflection. High-quality fluorescent screen is aluminized to increase light output.