Specialized - Cathode Ray ·CathodeRay
Flat-face three-inch oscilloscope CRT with a single electron gun, electrostatic focusing, and electrostatic deflection. Designed for accurate measuring equipment, it provides a compact direct-view precision trace.
Flat-face 3-inch oscilloscope tube with a single gun, electrostatic focusing and electrostatic deflection, intended for accurate measuring equipment.
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
No fixed ratings are recorded for this 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.
Grid No. 1 to all other electrodes capacitance
6.6 pF
Cathode to all other electrodes capacitance
4 pF
Accelerator voltage maximum
- to 2500 V
Accelerator input maximum
- to 6 W
Focusing electrode voltage maximum
- to 1000 V
Typical accelerator voltage
1500 V
Typical focusing electrode voltage
247 to 397 V
Grid No. 1 cutoff voltage
-80 to -40 V