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5CXP2

Five-inch flat-faced electrostatic oscillographic cathode-ray tube. Its electrostatic focusing and deflection provide precise direct-view waveform presentation for measurement and instrumentation applications.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: NEOEIGHTAR7
Base pins: 12
Nominal heater: 6.3 V / 600 mA

Description

5-inch flat-faced electrostatic oscillographic cathode-ray tube.

Socket description

Small-button Neoeightar 7-contact CRT base family

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: NEOEIGHTAR7
Base pins: 12
Nominal heater voltage: 6.3 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Cathode Ray

X-ray radiationInterelectrode capacitances

Max plate voltage: 2750 V

5-inch flat-faced electrostatic oscillographic cathode-ray tube.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1945 Continental Electronics

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

Focusing Method
Electrostatic
Deflecting Method
Electrostatic
Cathode to Other Electrodes Capacitance
5 pF
Approximate
Grid 1 to Other Electrodes Capacitance
5 pF
Approximate
Screen
P2
Green fluorescence; long persistence

Other

Anode 1 Voltage
- to 1100 V
Maximum
Grid Negative Bias
- to 220 V
Maximum magnitude
Anode 2 Voltage Typical
1500 V
Anode 1 Focusing Voltage
250 to 475 V
Grid Cutoff Voltage
-70 V
Deflection Factor D1D2
49 V/in
Approximate
Deflection Factor D3D4
39 V/in
Approximate