Tube-number record
NU-21P1
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BrandNational Union
ClassTelevision Picture Tube
BaseDuodecal
Filament6.3 V @ 600 mA
Construction
Primary TypeDisplay / CRT
EnvelopeRectangular All Glass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage18000 V
Grid 2 Voltage500 V
Grid 1 Voltage-125 V
H-C Voltage280 V
Audio Performance
Key Features
- Cylindrical Face Plate
- Magnetic Focus
- Magnetic Deflection
- Filterglass Face Plate
- Ion-Trap Gun
- 70 Degree Diagonal Deflection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 12000 V | — | — | — | — |
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