Tube-number record
21FDP4
0 archive entries
21FDP4 is a tube type in the TubeDatabase archive (class: Picture Tube). Recorded specifications: brand RCA, year 1962, 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.
BrandRCA
ClassPicture Tube
BaseCRT base (B7 family)
Filament6.3 V @ 600 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesControlled Warm-Up Time
Absolute Maximum Ratings
Plate Voltage20000 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard | 16000 V | — | — | — | — |
Application Notes
Heater-cathode voltage max 450V during 15s warm-up; 200V thereafter.
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