Specialized - Cathode Ray ·CathodeRay
Two-inch electrostatically focused and deflected oscilloscope CRT with a P11 phosphor screen. Published anode capability around 2 kV supports compact high-speed waveform and instrument indication.
Electrostatically focused and deflected oscilloscope/instrument CRT with P11 phosphor.
Octal 8-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
2BP1-family electrical system with P11 phosphor.
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
Heater voltage
6.3 V
Heater current
600 mA
Fluorescence
Blue
Application
Oscilloscope / precision instrument display
Typical anode-2 voltage
2750 V
Typical anode-1 focus voltage
1100 V
Grid cutoff voltage range
-67.5 to -135 V
Anode-2 voltage maximum
3000 V
Data set 02
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Heater current
600 mA
Peak heater-cathode voltage, heater negative
125 V
Typical final accelerating anode voltage
1500 V
Maximum deflecting electrode voltage
550 V
Focusing method
Electrostatic
Deflection method
Electrostatic
Phosphor
P11
Fluorescence
Blue
Persistence
Short
Grid #1 to all other electrodes capacitance
8 pF
Approximate
Application
Oscillograph/cathode-ray display