Tube-number record
21EVP4
0 archive entries
21EVP4 is a tube type in the TubeDatabase archive (class: Television Picture Tube). Recorded specifications: brand PHILCO, year 1959, construction Display / CRT, socket CRT base (B7 family), and maximum plate voltage 20000 V. The archive does not yet hold a photographed example of this type.
BrandPHILCO
ClassTelevision Picture Tube
BaseCRT base (B7 family)
Filament2.68 V @ 450 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesControlled warm-up time for series string applications
Absolute Maximum Ratings
Plate Voltage20000 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Grid Drive Service | 16000 V | — | — | — | — |
| Cathode Drive Service | 16000 V | — | — | — | — |
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