Specialized - Cathode Ray ·CathodeRay
Rectangular Philips cathode-ray tube with electrostatic deflection, documented for both radar and oscillography. Its dual-purpose design supports persistent indicator or waveform display applications.
Rectangular radar/oscillography cathode-ray tube with electrostatic deflection.
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
Electrostatic focusing/deflection CRT section; electrical/screen/deflection data retained in parameter rows.
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
300 mA
Phosphor Variant
blue, short persistence text
Screen fluorescence and persistence
Screen Shape
Rectangular text
Radar or oscilloscope service
Data set 02
Published operating points and test conditions from this source.
Main accelerating voltage
1800 V
Maximum post-acceleration voltage
6000 V
Maximum focusing-grid voltage
1100 V
Maximum main accelerating voltage
2500 V
Maximum cathode current
300 uA
Maximum heater-cathode voltage
150 V
Grid capacitance
10 pF
Deflection-plate capacitance D1
16 pF
Maximum
Deflection-plate capacitance D2
20 pF
Maximum
Data set 03
Published operating points and test conditions from this source.
Accelerator voltage
2500 V
Typical accelerator voltage
1800 V
Maximum heater voltage at switch-on in series chain
9.5 V
SeriesHeater