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Specialized - Cathode Ray ·CathodeRay

3AKP4A

Compact P4 cathode-ray display tube with electrostatic focusing, magnetic deflection, and an aluminized screen; phosphor characteristics provide the persistence and fluorescence appropriate to the P4 variant.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 300 mA

Description

The Du Mont 3AKP4A is a three-inch low-voltage aluminized radar CRT for airborne, marine, and portable radar receivers. This variant uses a P4 screen with white fluorescence and short-to-medium persistence.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
300 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

No fixed ratings are recorded for this section.

Cathode-ray display/electron-gun section.

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

1960 Du Mont

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Heater Voltage

    6.3 V

  • Heater Current

    300 mA

  • Focusing Method

    Electrostatic text

  • Deflection Method

    Magnetic text

  • Phosphor

    P4 text

  • Fluorescence

    White text

  • Persistence

    Short-to-medium text

  • Screen Construction

    Aluminized text