Tube-number record
20FP4
0 archive entries
20FP4 is a tube type in the TubeDatabase archive (class: Cathode Ray Tube). Recorded specifications: brand TUNG-SOL, year 1954, construction Rectangular Glass, socket Duodecal, and maximum plate voltage 18000 V. The archive does not yet hold a photographed example of this type.
BrandTUNG-SOL
ClassCathode Ray Tube
BaseDuodecal
Filament6.3 V @ 600 mA
Construction
Primary TypeRectangular Glass
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesUnipotential Cathode
Absolute Maximum Ratings
Plate Voltage18000 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Television Application | 12000 V | — | — | — | — |
Application Notes
Direct-view picture tube designed for use in television applications. Features a 17 1/4" x 13 1/4" raster size.
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