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Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Cathode Ray ·CathodeRay

24YP4

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
B12D
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.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
12L
Socket code
B12D
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

    LowVoltageElectrostatic

  • DeflectingMethod

    Magnetic

  • DiagonalDeflectionAngleApproximate

    90 degree

  • PhosphorNumber

    4

  • FluorescentColor

    White

  • Faceplate

    Gray filter; aluminized screen

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

    18000 V

    Published maximum anode voltage

  • Anode voltage

    20000 V

    Anode voltage . . . . . . . . . . . . . . . . 20,000 Volts dc

  • After Equipment Warm-Up Period . . . . . . . 180 VoltsHeaterPositivewithRespecttoCathode

    180 V

    After Equipment Warm-Up Period . . . . . . . 180 VoltsHeaterPositivewithRespecttoCathode.....180Volts

  • Anode voltage

    18000 V

    Anode voltage . . . . . . . . . . . . . . . .18,000 Volts dcGridNo.4Voltage. . . . . . T72to+396VoltsdcGridNo2Voltage. . . . . . . .300VoltsdcGridNo.1VoltageRequiredforcutoff3. . .-28to-72VoltsdcJfuIonTrapMagnetstrength(approx.). . . . .40Gausses

Characteristic

  • Heater voltage

    6.3 V

    Published heater voltage

  • Faceplate . . . . . . . . . . . . . Gray Filter GlassLightTransmittance(approx.)

    68 %

    Faceplate . . . . . . . . . . . . . Gray Filter GlassLightTransmittance(approx.)..........68Percent

  • Heater warm-up Time]

    11 s

    Heater warm-up Time] . . . . . . . . . . . . 11 Seconds

CircuitValue

  • I. Heater ouaran-ttp lime il the tii'ne ieqwired_for lbe Voltage acrgSS the beater terminals lo increase to

    5 V

    I. Heater ouaran-ttp lime il the tii'ne ieqwired_for lbe Voltage acrgSS the beater terminals lo increase to 5.0 Volts in lbe

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

  • LOH VOLTAGE ELECTROSTATIC FOCUS — value 1

    10 V

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

  • LOH VOLTAGE ELECTROSTATIC FOCUS — value 2

    10 V

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

  • FOCUSI N.G METHOD

    10 V

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

  • DIRECT INTERELECTRODE CAPACITANCES (APPR OX.) — value 1

    1

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

  • DIRECT INTERELECTRODE CAPACITANCES (APPR OX.) — 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 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

    1200

    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.

  • HEATER VOLTAGE

    7.3 V

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

  • HEATER CURRENT

    600 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.

  • AC ATNODE SHOULD BE RETUR N:D TO ONE SIDE OR TO THE MID-TAP OF THE HEATER TRANSFOPM ER WINDING. — value 1

    0

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

  • AC ATNODE SHOULD BE RETUR N:D TO ONE SIDE OR TO THE MID-TAP OF THE HEATER TRANSFOPM ER WINDING. — value 2

    0

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

  • AC ATNODE SHOULD BE RETUR N:D TO ONE SIDE OR TO THE MID-TAP OF THE HEATER TRANSFOPM ER WINDING. — value 3

    0

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

  • BVI SU AL EXTINCTION OF UN DEFLECTED FOCUSED SPOT.

    0

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

  • PIN gp

    2

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

Other

  • MAXIMUM EXTERNAL CONDUCTIVE COATING TO ANODE

    1500

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

  • MAXIMUM OC ANODE, GRID #3 VOLTAGE — value 1

    0 V

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

  • MAXIMUM OC ANODE, GRID #3 VOLTAGE — value 2

    3 V

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

  • MAXIMUM OC ANODE, GRID #3 VOLTAGE — value 3

    20000 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

    0 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 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 GRID #1 CIRCUIT RESISTANCE — value 1

    1 Mohm

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

  • MAXIMUM GRID #1 CIRCUIT RESISTANCE — value 2

    1.5 Mohm

    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