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5ACP4

Five-inch CRT with electromagnetic deflection, electrostatic zero-focus-voltage operation, and a metal-backed P4 screen. Published anode capability reaches approximately 18 kV for bright specialized display service.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: 8EQ
Socket code: -
Base pins: 8
Nominal heater: 6.3 V / 600 mA

Description

Electromagnetic-deflection, electrostatic-focus zero-focus-voltage CRT; metal-backed P4 screen.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8EQ
Socket code: -
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8EQ - 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: 18000 V
Max screen voltage: 410 V
Rectifier max heater-cathode voltage: 125 V

Published applicable promoted ratings populated; remaining device-specific values retained 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

1955 Vacuum Tube Products

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

Typical Anode Voltage
12000 V
Typical Grid 2 Voltage
250 V
Grid 1 Voltage Range
-63 to -27 V
Focus Voltage Range
-500 to 500 V
Grid 1 Circuit Resistance Maximum
1.5 Mohm
Grid 2 Circuit Resistance Minimum
470 ohm
Anode Circuit Resistance Minimum
15000 ohm

Characteristic

Deflection Angle
53 degree