Tube-number record
21FMP4
0 archive entries
21FMP4 is a tube type in the TubeDatabase archive (class: Cathode Ray Tube). Recorded specifications: brand General Electric, year 1962, construction Display / CRT, socket CRT base (B7 family), and maximum plate voltage 22000 V. The archive does not yet hold a photographed example of this type.
BrandGeneral Electric
ClassCathode Ray Tube
BaseCRT base (B7 family)
Filament6.3 V @ 600 mA
Construction
Primary TypeDisplay / CRT
EnvelopeRectangular
Sections1
Filament / Heater
Warm-up Time11s
Heater NotesWarm-up time 11 seconds
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Cathode Drive Service | 18000 V | — | — | — | — |
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