Tube-number record
21ALP4
0 archive entries
21ALP4 is a tube type in the TubeDatabase archive (class: Cathode-Ray Tube). Recorded specifications: brand General Electric, year 1956, construction Display / CRT, base Small-shell Duodecal, socket Duodecal, and maximum plate voltage 18000 V. The archive does not yet hold a photographed example of this type.
BrandGeneral Electric
ClassCathode-Ray Tube
BaseDuodecal
Filament6.3 V @ 600 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
Base MaterialSmall-shell Duodecal
Sections1
Filament / Heater
Heater NotesHeater current 0.6A ± 10%
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Television Application | 16000 V | — | — | — | — |
Application Notes
Anode, grid-No. 3 and grid-No. 5 are connected together. If operated above 16,000 volts, x-ray radiation shielding may be necessary.
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