Tube-number record

21DLP4

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BrandRadio Corporation of America

ClassPicture Tube

BaseDuodecal

Filament6.3 V @ 600 mA

Construction

Primary TypeDisplay / CRT

EnvelopeGlass

Base MaterialPlastic

Sections1

Heater NotesUnipotential Cathode

Plate Voltage20000 V

Grid 2 Voltage500 V

Grid 1 Voltage-140 V

H-C Voltage180 V

Key Features

Mode	Plate V	Gm (µmhos)	Rp (Ω)	µ	Plate mA
Grid-Drive Service	16000 V	—	—	—	—

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.

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