Specialized - Cathode Ray ·CathodeRay
Dual-gun CRT with electrostatic focusing and deflection and a P7 long-persistence screen, explicitly intended for combined radar-indicator and oscilloscope service.
Dual-gun electrostatic-focus/electrostatic-deflection radar/oscilloscope indicator CRT with P7 screen.
Medium-shell Diheptal 12-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
Special-purpose cathode-ray tube; published ratings and construction data captured.
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.
Focusing method
Electrostatic
Deflection method
Electrostatic
Application
Electrostatic charge printing
Multiple independent guns
Yes
Data set 02
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Heater current
1.2 A
Focusing method
Electrostatic
Deflection method
Electrostatic
Line width maximum
0.03 in
Useful scan
4 in
Maximum principal anode/accelerator voltage
4000 V
Anode1 voltage maximum
1100 V
Grid2 voltage maximum
2860 V
Grid3 voltage maximum
2860 V
Heater-cathode voltage maximum
200 V
Typical anode3 voltage
4000 V
Typical grid2 voltage
2000 V
Typical grid3 voltage range
1850 to 2150 V
Grid1 circuit resistance maximum
1.5 Mohm
Deflection-circuit resistance maximum
5 Mohm
Application
Dual-gun electrostatic-focus/electrostatic-deflection radar/oscilloscope indicator CRT
Gun count
2
Phosphor
P7