Specialized - Cathode Ray ·CathodeRay
Twenty-one-inch direct-view picture tube with magnetic focusing and magnetic deflection and a metal-backed P23 screen. Designed for high-voltage display service, its manufacturer documentation includes an X-ray radiation warning.
21-inch magnetic-focus, magnetic-deflection direct-view picture tube with metal-backed P23 screen; X-ray warning published.
Small-shell Duodecal 5-contact CRT base
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
CRT anode and grid-2 maximum ratings are promoted from the printed ratings block; other CRT-specific focus/drive/deflection values are preserved in parameters.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Typical Anode Voltage
16000 V
Phosphor
P23
Heater Voltage Nominal
6.3 V
Heater Current Nominal
600 mA
Cathode to All Other Electrodes Capacitance
5 pF
Approximate
Grid 1 to All Other Electrodes Capacitance
6 pF
Approximate