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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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Tube-number record

21DLP4

0 archive entries

21DLP4 is a tube type in the TubeDatabase archive (class: Picture Tube). Recorded specifications: brand Radio Corporation of America, year 1958, construction Display / CRT, base Plastic, socket Duodecal, and maximum plate voltage 20000 V. The archive does not yet hold a photographed example of this type.

BrandRadio Corporation of America
ClassPicture Tube
BaseDuodecal
Filament6.3 V @ 600 mA

Construction

Primary TypeDisplay / CRT
EnvelopeGlass
Base MaterialPlastic
Sections1

Filament / Heater

Heater NotesUnipotential Cathode

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Grid-Drive Service16000 V————

Application Notes

The 21DLP4 is a 90-degree glass picture tube requiring no ion-trap magnet. It features a short overall length and a wide-angle deflection system.

Filters

0 tubes found

Manufacturers

Brands

    0 results
    Plate Voltage20000 V
    Grid 2 Voltage500 V
    Grid 1 Voltage-140 V
    H-C Voltage180 V

    Audio Performance

    Key Features
    • Aluminized screen
    • Rectangular faceplate
    • Low-voltage electrostatic focus
    • Magnetic deflection
    • Spherical faceplate
    • Filterglass faceplate