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Tube Tinker — Electron Tube Database
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Specialized - Cathode Ray ·CathodeRay

24DP4A

Twenty-four-inch direct-view monochrome television picture tube with a P4 screen and magnetic deflection. Manufacturer documentation provides the high-voltage operating, focusing, optical, and capacitance characteristics required for receiver display service.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
12L
Socket code
-
Base pins
6
Nominal heater
6.3 V / 600 mA

Description

Direct-view cathode-ray picture tube intended for television display service. The supplied Tung-Sol datasheet provides electrical ratings, operating conditions, capacitances, optical characteristics, focusing and deflection information. Features an aluminized screen where specified by this designation.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
12L
Socket code
-
Base pins
6
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

12L - 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 0

Cathode Ray

X-ray radiationInterelectrode capacitances
Max plate voltage
20000 V
Max screen voltage
500 V

Picture-tube anode maximum 20 kV; source includes X-ray shielding warning above 16 kV.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 0

Cathode Ray

Characteristics

  • Phosphor

    P4

  • Deflection method

    Magnetic

  • Focusing method

    Electrostatic

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 0

Cathode Ray

Other

  • Maximum Anode Voltage

    20000 V

  • Typical Anode Voltage

    18000 V

  • Maximum Grid2 Voltage

    500 V

  • Typical Grid2 Voltage

    200 V

Characteristic

  • FocusingMethod

    Electrostatic

  • DeflectingMethod

    Magnetic

  • DiagonalDeflectionAngleApproximate

    90 degree

  • PhosphorNumber

    4

  • FluorescentColor

    White

Data set 03

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 0

Cathode Ray

Other

  • Maximum anode voltage

    20000 V

    Published maximum anode voltage

  • Af ter Equipment Warm-Up Period

    180 V

    Af ter Equipment Warm-Up Period ..... 180 Volts

  • Heater Positive with Respect to Cathode

    180 V

    Heater Positive with Respect to Cathode . . . 180 Volts

  • Ion Trap Magnet strength (approx.)

    40 G

    Ion Trap Magnet strength (approx.) . 40 Gausses

CircuitValue

  • Grid No. 1 Circuit Resistance

    1.5 Mohm

    Grid No. 1 Circuit Resistance ..... .1.5 Megohms Max. TELEvlsloN plc'nTRE TUBE

Data set 04

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 0

Cathode Ray

Characteristics

  • DIRECT INTERELECTRODE CAPACITANCES (APPROX.)

    1

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • GRID #1 TO ALL OTHER ELECTRODES — value 1

    1

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • GRID #1 TO ALL OTHER ELECTRODES — value 2

    0

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • GRID #1 TO ALL OTHER ELECTRODES — value 3

    6

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MINIMUM EXTERNAL CONDUCTIVE COATING TO ANODE

    500

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • PHOSPHOR NUMBER

    4

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • FACEPLATE LIGHT TRANSMISSION — value 1

    11 percent

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • FACEPLATE LIGHT TRANSMISSION — value 2

    3 percent

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • HEATER VOLTAGE

    6.3 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • HEATER CURRENT

    0 mA

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • HEATER POSITIVE WITH RESPECT TO CATHODE

    180 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DC ANODE S GRID #} VOLTAGE

    18000 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DC GRID #2 VOLTAGE — value 1

    2 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DC GRID #2 VOLTAGE — value 2

    300 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • OC GRID #i VOLTAGE S — value 1

    1 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • OC GRID #i VOLTAGE S — value 2

    33 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • OC GRID #i VOLTAGE S — value 3

    77 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DC GRID #4 VOLTAGE — value 1

    4 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DC GRID #4 VOLTAGE — value 2

    72 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DC GRID #4 VOLTAGE — value 3

    400 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • OC ION TRAP CURRENT STANDARD COIL #111 (APPROX.) — value 1

    111 mA

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • OC ION TRAP CURRENT STANDARD COIL #111 (APPROX.) — value 2

    100 mA

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • OC ION TRAP CURRENT STANDARD COIL #111 (APPROX.) — value 3

    50 mA

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • BVIGU AL E%TINCTIDM OF UNDEFL ELTEO FOCUSED SPOT.

    0

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • ANODE — value 1

    1

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • ANODE — value 2

    1

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

Other

  • MAXIMUM DC ANODE S GRID #} VOLTAGE

    20000 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM DC GRID #2 VOLTAGE — value 1

    2 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM DC GRID #2 VOLTAGE — value 2

    500 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM GRID #1 VOLTAGE

    1 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM DC GRID #4 VOLTAGE — value 1

    4 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM DC GRID #4 VOLTAGE — value 2

    500 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM DC GRID #4 VOLTAGE — value 3

    1000 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM

    1

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

Data set 05

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 0

Cathode Ray

Other

  • Grid Number 2 Voltage Maximum

    500 V

  • Typical Anode Voltage

    16000 V

    TypicalOperation