Tube-number record
21CGP4
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BrandTung-Sol
ClassCathode Ray Picture Tube
BaseDuodecal
Filament6.3 V @ 600 mA
Construction
Primary TypeDisplay / CRT
EnvelopeRectangular Glass
Base MaterialPlastic
Sections1
Filament / Heater
Heater NotesUnipotential Cathode
Absolute Maximum Ratings
Plate Voltage20000 V
Grid 2 Voltage200 V
Grid 1 Voltage125 V
H-C Voltage180 V
Audio Performance
Key Features
- Aluminized screen
- Electrostatic focus
- Magnetic deflection
- Gray filter faceplate
- External conductive coating
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard | 18000 V | — | — | — | — |
Application Notes
Average raster cutoff with grid drive may be calculated: Eglco = .502 * Eg2 + 4.8. Anode voltage should not be less than 14,000 Volts.
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