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Tube Database (7,341 tube types · 1,270 archive entries)

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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21ACP4 vacuum tube outline illustration

Tube-number record

21ACP4

0 archive entries

21ACP4 is a tube type in the TubeDatabase archive (class: Cathode-Ray Tube). Recorded specifications: brand General Electric, year 1956, construction Display / CRT, socket Duodecal, and maximum plate voltage 20000 V. The archive does not yet hold a photographed example of this type.

BrandGeneral Electric
ClassCathode-Ray Tube
BaseDuodecal
Filament6.3 V @ 610 mA

Construction

Primary TypeDisplay / CRT
EnvelopeC171 Exp. 2
Sections1

Filament / Heater

Heater NotesIndirectly heated

Absolute Maximum Ratings

Plate Voltage20000 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Typical Operation16000 V————

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Manufacturers

Brands

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    Grid 2 Voltage500 V
    Grid 1 Voltage-125 V
    H-C Voltage180 V

    Audio Performance

    Key Features
    • 90-Degree Deflection Angle
    • Gray Faceplate
    • Ion-trap gun
    • External conductive coating