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Specialized - Cathode Ray ·CathodeRay

23FP4A

Large aluminized P4 monochrome television picture tube for high-voltage direct-view service, using electrostatic focusing and magnetic deflection with manufacturer-specified operating characteristics for type 23FP4A.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
DUODECAL5
Base pins
7
Nominal heater
6.3 V / 60 A

Description

23-inch 114-degree monochrome television CRT with electrostatic focus, magnetic deflection, and aluminized P4 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
7
Nominal heater voltage
6.3 V
Nominal heater current
60 A
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
Max plate voltage
22500 V
Max screen voltage
450 V

CRT-specific ratings, operating conditions, capacitances, focus/deflection, cutoff, optical, and screen data are retained in section 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

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Focusing method

    Electrostatic

  • Deflection method

    Magnetic

  • Heater voltage

    6.3 V

  • Heater current

    600 mA

  • Diagonal deflection angle

    114 deg

  • Heater warm-up time

    11 s

Construction

  • Phosphor

    Aluminized P4

Other

  • Maximum anode voltage

    22500 V

  • Grid1 circuit resistance maximum

    1.5 Mohm

  • Anode voltage minimum

    12000 V

  • Typical anode voltage

    17000 V

  • Typical focus-electrode voltage

    250 V

  • Typical grid2 voltage

    500 V

  • Focus-electrode voltage minimum

    -550 V

  • Focus-electrode voltage maximum

    1100 V

  • Heater-cathode voltage maximum

    200 V

Application

  • Application

    Monochrome television picture display

Capacitance

  • Cathode-to-all capacitance

    5 pF

  • Grid1-to-all capacitance

    6 pF

Data set 02

1971 RCA HB3 Binder 1 of 7

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • LOW-VOLTAGE ELECTROSTATIC FOCUS — published value 1

    1 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • LOW-VOLTAGE ELECTROSTATIC FOCUS — published value 2

    14 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid No.1 to all other electrodes

    6 pF

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Heater Current at 6.3 volts — published value 1

    6.3 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Heater Current at 6.3 volts — published value 2

    600 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Heater Current at 6.3 volts — published value 3

    60 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Heater Warm-Up Time (Average)

    11

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Light transmission (Approx )

    78

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Projected Area of Screen

    282

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Anode Voltage

    14000 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No.4 Voltage — published value 1

    0 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No.4 Voltage — published value 2

    400 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No.2 Voltage

    450 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • of focused raster — published value 1

    -45 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • of focused raster — published value 2

    -105 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

Other

  • ANODE VOLTAGE

    123500 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Combined AC and DC voltage

    200 V

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Grid-No.l-Circuit Resistance

    1.5 mA

    Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.