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Specialized - Cathode Ray ·CathodeRay

23MP4A

Large P4 monochrome television picture tube designed for high-voltage direct-view service, using manufacturer-specified focusing, magnetic deflection, and beam-control arrangements for type 23MP4A.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
DUODECAL5
Base pins
-
Nominal heater
6.3 V / 600 mA

Description

23-inch 114-degree monochrome television CRT with electrostatic focus, magnetic deflection, and aluminized screen.

Socket description

Small-shell Duodecal 5-contact CRT base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
DUODECAL5
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
600 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.

Television CRT electron-gun/display 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

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Heater Voltage

    6.3 V

  • Heater Current

    600 mA

  • Focusing Method

    Low Voltage Electrostatic text

  • Deflection Method

    Magnetic text

  • Horizontal Deflection Angle

    102 deg

    Approximate

  • Vertical Deflection Angle

    86 deg

    Approximate

  • Diagonal Deflection Angle

    114 deg

    Approximate

  • Phosphor

    Aluminized P4 text

  • Fluorescence

    White text

  • Light Transmittance

    78 percent

    Approximate

  • Cathode-to-All Capacitance

    5 pF

    Approximate

  • Grid1-to-All Capacitance

    6 pF

    Approximate

  • External Coating-to-Anode Capacitance Minimum

    1700 pF

  • External Coating-to-Anode Capacitance Maximum

    2500 pF

Other

  • Maximum Anode Voltage

    23000 V

  • Minimum Anode Voltage

    11000 V

  • Maximum Focus Electrode Positive Voltage

    1100 V

    Grid4

  • Maximum Focus Electrode Negative Voltage

    -550 V

    Grid4

  • Maximum Grid2 Voltage

    700 V

  • Minimum Grid2 Voltage

    300 V

  • Maximum Heater-Cathode Voltage During Warmup

    450 V

    Duration<=15s

  • Maximum Heater-Cathode Voltage After Warmup

    200 V

  • Typical Anode Voltage

    20000 V

    CathodeDrive

  • Typical Focus Voltage Minimum

    0 V

    Grid4

  • Typical Focus Voltage Maximum

    400 V

    Grid4

  • Typical Grid2 Voltage

    500 V

    CathodeDrive

  • Cathode Voltage for Raster Cutoff Minimum

    45 V

    CathodeDrive

  • Cathode Voltage for Raster Cutoff Maximum

    95 V

    CathodeDrive

  • Maximum Grid1 Circuit Resistance

    1.5 Mohm