Tube-number record

21AQP4, 21AQP4A

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BrandTung-Sol

ClassCathode Ray Tube

BaseDuodecal

Filament6.3 V @ 600 mA

Construction

Primary TypeDisplay / CRT

EnvelopeGlass

Base MaterialSmall Shell Duodecal 5-Pin

Sections1

Heater NotesUnipotential Cathode

Plate Voltage18000 V

Grid 2 Voltage500 V

H-C Voltage180 V

Key Features

Mode	Plate V	Gm (µmhos)	Rp (Ω)	µ	Plate mA
Typical	16000 V	—	—	—	—

Direct view picture tubes designed for use in television applications. 21AQP4A is aluminized.

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