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8RP4

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: 8MC
Socket code: -
Base pins: 8
Nominal heater: 6.3 V / 300 mA

Description

The 8RP4 is an eight-inch electrostatic-focus, magnetic-deflection cathode-ray tube for monitor use in closed-circuit television, studio broadcasting, and industrial applications.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8MC
Socket code: -
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8MC - 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

No fixed ratings are recorded for this section.

Cathode-ray section. Datasheet warns that X-ray shielding may be necessary above 16 kV.

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

AnodeVoltageMax
20000 V
AnodeVoltageTypical
16000 V
Grid2VoltageMax
700 V
Grid2VoltageTypical
300 V
Heater Voltage o 2 o o o s 5 s s o o s s8 5 o o
6.3 V
GENERAL
Diagonal o o 5 o o s 2 o s o a s o o o
10 deg
GENERAL
Horizontal o o o o o o o o o o s o s s o
4 deg
GENERAL
Vertical o o o o o s o o s s o o a o a o
50 deg
GENERAL
Light Transmission at Center Approximate L
80 %
GENERAL
Anode Contact Aligns WithoPin No 1 Position +
30 deg
MECHANICAL
Anode VOltage s o o s 5 s s o o 16
0 V
MAXIMUM RATINGS
Grid No 2 VOlItage o o o o o o a a o s s o o o
300 V
MAXIMUM RATINGS
Grid No 1 Voltage 2 2 o s o o o 33 to
72 V
MAXIMUM RATINGS
Focusing Electrode Voltagee o o o o o
-100 to 400 V
MAXIMUM RATINGS
anode current of
100 uA
+ The maximum ratings provide a ten percent safety factor in
If this tube is operated at voltages in excess of 16
0 V
+ The maximum ratings provide a ten percent safety factor in