21FCP4
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BrandLe Cathoscope
ClassCathode Ray Tube
BaseB8-208
Filament6.3V @ 350mA
Construction
Primary TypeElectrostatic focus, Magnetic deflection
Envelope171-G1
SectionsSingle
Filament / Heater
MaterialSulfide type
Warm-up Time11s
Heater NotesUnipotential cathode
Absolute Maximum Ratings
Plate Voltage16000 V
Grid 2 Voltage640 V
Grid 1 Voltage140 V
H-C Voltage180 V
Audio Performance
Key Features
- Short overall length
- Small neck diameter
- Aluminized screen
- Non-ion trap gun
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Cathode drive service | 16000V | - | - | - | - |
Application Notes
The 21 FC P4 is an electrostatic focus and magnetic deflection, direct viewing picture tube. Features include a short overall length and a non-ion trap gun.
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