Tube-number record
21ASP4
0 archive entries
21ASP4 is a tube type in the TubeDatabase archive (class: Cathode Ray Picture Tube). Recorded specifications: brand Tung-Sol, year 1957, construction Rectangular Glass, base Plastic, socket Duodecal, and maximum plate voltage 18000 V. The archive does not yet hold a photographed example of this type.
BrandTung-Sol
ClassCathode Ray Picture Tube
BaseDuodecal
Filament6.3 V @ 600 mA
Construction
Primary TypeRectangular Glass
EnvelopeGlass
Base MaterialPlastic
Sections1
Filament / Heater
Heater NotesUnipotential cathode
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Direct-view monochrome television | 16000 V | — | — | — | 0.1 mA |
Application Notes
The 21ASP4 is identical to the 21XP4 in all respects except that the external conductive coating is not applied.
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