Specialized - Cathode Ray ·CathodeRay
Twelve-inch cathode-ray display tube using electrostatic focusing and magnetic deflection. Its P19 screen provides orange fluorescence with long persistence, making it useful where a trace must remain visible after excitation in direct-view display service.
Twelve-inch special-purpose CRT with gray-filter faceplate, electrostatic focus and magnetic deflection; phosphor variant as designated.
Duodecal 12-contact
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
Cathode-ray display/electron-gun section.
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.
Heater Voltage
6.3 V
Heater Current
600 mA
Focusing Method
Electrostatic text
Deflection Method
Magnetic text
Phosphor
P19 text
Fluorescence
Orange text
Persistence
Long text
Deflection Angle
55 deg
Approximate
Data set 02
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Heater current
600 mA
Anode voltage maximum
13200 V
Grid No. 2 voltage maximum
770 V
Grid No. 1 negative bias maximum
200 V
Heater-cathode peak voltage
200 V