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Specialized - Cathode Ray ·CathodeRay

23FMP4

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 23FMP4.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B12D
Base pins
-
Nominal heater
6.3 V / 450 mA

Description

23ETP4-equivalent Pan-O-Ply television CRT with 450 mA heater rating.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B12D
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
450 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
Max plate voltage
23000 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

1964 RMA EIA

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Focusing method

    Electrostatic

  • Deflection method

    Magnetic

  • Horizontal deflection angle

    99 deg

  • Vertical deflection angle

    82 deg

  • Diagonal deflection angle

    110 deg

  • Heater voltage

    6.3 V

  • Heater current

    450 mA

  • Difference from 23ETP4

    450 mA heater rating instead of 600 mA

Capacitance

  • Cathode-to-all capacitance

    5 pF

  • Grid1-to-all capacitance

    6 pF

  • External coating capacitance minimum

    1700 pF

  • External coating capacitance maximum

    2500 pF

Other

  • Anode voltage maximum

    23000 V

  • Anode voltage minimum

    12000 V

  • Typical anode voltage

    16000 V

  • Typical focus-electrode voltage

    250 V

  • Typical grid2 voltage

    50 V

Application

  • Application

    Monochrome television picture display

Data set 02

1971 RCA HB3 Binder 1 of 7

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • e„'~

    10 V

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

  • Heater ~urre~`. 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 ~urre~`. at 6.3 volts — published value 2

    450 V

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

  • Heater ~urre~`. at 6.3 volts — published value 3

    20 V

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