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Specialized - Cathode Ray ·CathodeRay

23FRP4

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 23FRP4.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B12D
Base pins
7
Nominal heater
6.9 V / 20 A

Description

23-inch 110-degree filled-rim monochrome television CRT with short neck and low-grid-2 cathode drive.

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
7
Nominal heater voltage
6.9 V
Nominal heater current
20 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
23000 V
Max screen voltage
10 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

  • Heater warm-up time

    11 s

  • External coating-to-implosion hardware resistance minimum

    50 Mohm

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

  • Grid2 voltage minimum

    25 V

  • Heater voltage maximum

    6.9 V

  • Heater voltage minimum

    5.8 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

  • 1 10° MAGNETIC DEFLECTION — published value 1

    1 V

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

  • 1 10° MAGNETIC DEFLECTION — published value 2

    10 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.

  • External conductive coating to anodes 1700 min-2500 max pF — published value 1

    1700 mA

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

  • External conductive coating to anodes 1700 min-2500 max pF — published value 2

    2500 mA

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

  • Heater Current at 6.3 V — published value 1

    6.3

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

  • Heater Current at 6.3 V — published value 2

    450

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

  • Heater Current at 6.3 V — published value 3

    20

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

  • Light transmission at center (Approx.)

    42

    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 — published value 1

    1 V

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

  • Anode Voltage — published value 2

    1000 V

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

  • Anode Voltage — published value 3

    23000 V

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

  • Grid-No.2 Voltage — published value 1

    25 V

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

  • Grid-No.2 Voltage — published value 2

    60 V

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

  • Heater Voltage — published value 1

    5.7 V

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

  • Heater Voltage — published value 2

    6.9 V

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

  • Combines ~C & DC voltage

    200 V

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

  • Anode Voltage

    16000 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-N o.2 Voltage

    50 V

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

  • Cathode Voltage — published value 1

    32 V

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

  • Cathode Voltage — published value 2

    50 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.

  • MINIMUM SCREEN — published value 1

    1

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

  • MINIMUM SCREEN — published value 2

    200

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