Tube-number record
NU-21P1
0 archive entries
NU-21P1 is a tube type in the TubeDatabase archive (class: Television Picture Tube). Recorded specifications: brand National Union, year 1951, construction Display / CRT, socket Duodecal, and maximum plate voltage 18000 V. The archive does not yet hold a photographed example of this type.
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
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 12000 V | — | — | — | — |
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