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4GP1

Eight-centimeter instrument CRT with electrostatic focusing and deflection, a flat photographic-blue screen, and one stage of post-deflection acceleration. Designed for high-precision instrumentation, it provides a bright, accurately positioned trace.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: B12D
Base pins: -
Nominal heater: 6.3 V / 500 mA

Description

The 4GP1 is an 8 cm electrostatic-focus and electrostatic-deflection instrument cathode-ray tube with a flat photographic-blue screen and one stage of post-deflection acceleration for high-precision instruments.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B12D
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 500 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: 8000 V

Highest published post-deflection/anode supply limit mapped to MaxPlateVoltage; deflection-electrode limits and sensitivities preserved as parameters.

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

Typical Post-Deflection Voltage
4000 V
Typical Anode-3 Voltage
2000 V
Cutoff Grid Voltage
-67 V

Capacitance

Cathode-to-All Capacitance
8 pF
Grid-to-All Capacitance
17 pF