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8JP4

Eight-inch P4 cathode-ray display tube for high-voltage direct visual service, using magnetic deflection and manufacturer-specified focusing, grid-control, and accelerating-voltage characteristics.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: B7-183
Socket code: EIGHTAR7
Base pins: 7
Nominal heater: 6.3 V / 600 mA

Description

8-inch direct-view receiver check cathode-ray tube with self-focus straight gun, magnetic deflection, aluminized screen, gray-filter face, and 110-degree deflection.

Socket description

Eightar 7-contact CRT base family

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: B7-183
Socket code: EIGHTAR7
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

B7-183 - 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 0

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

CRT electrode ratings, focusing/deflection data, capacitances, and operating voltages are preserved in parameter rows.

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

1951 Thomas Electronics

Published operating points and test conditions from this source.

SECTION 0

Cathode Ray

Characteristic

FocusingMethod
Electrostatic
DeflectionMethod
Magnetic
Deflection Angle
110 degree
Heater Voltage
6.3 V
Heater Current
600 mA

Other

MaximumMainAnodeOrAcceleratorVoltage
20000 V
TypicalMainAnodeOrAcceleratorVoltage
16000 V
MaximumFocusingElectrodeVoltage
-500 to 1000 V
Maximum Heater Cathode Voltage
180 V
AfterWarmup
WarmupHeaterCathodeVoltage
410 V
15SecondWarmup

Capacitance

Cathode To All Capacitance
5 pF