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

24TP4

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
12N
Socket code
B12D
Base pins
5
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
12N
Socket code
B12D
Base pins
5
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

12N - 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
0 V
Max screen voltage
500 V

CRT electrode, focus, deflection and optical data preserved in parameter rows.

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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Maximum Anode Voltage

    20000 V

  • Typical Anode Voltage

    14000 V

  • Maximum Grid2 Voltage

    500 V

  • Typical Grid2 Voltage

    200 V

Characteristic

  • FocusingMethod

    Magnetic

  • DeflectingMethod

    Magnetic

  • DiagonalDeflectionAngleApproximate

    90 degree

  • PhosphorNumber

    4

  • FluorescentColor

    White

Data set 02

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • MAGNETIC FOCUS 8 DEFLECTION

    8

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

  • RECTANGULAR GLASS CONSTRUCTION

    10

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

  • DIRECT

    1

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

  • GRID #1 TO ALL OTHER — 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 — 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 — 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

    250

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

  • PHOSPHOR

    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

    72 percent

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

  • HEATER VOLTAGE

    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 NE 6ATIVE WITH RESPECT TO CATHODE

    6

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

  • HEATER POSITIVE WITH RESPECT TO CATHODE — value 1

    1 V

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

  • HEATER POSITIVE WITH RESPECT TO CATHODE — value 2

    0 V

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

  • DC ANOOE VOLTAGE — value 1

    1 V

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

  • DC ANOOE VOLTAGE — value 2

    0 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.

  • DC GRID #i VOL TAGE A — value 1

    1 V

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

  • DC GRID #i VOL TAGE A — value 2

    33 V

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

  • DC GRID #i VOL TAGE A — value 3

    77 V

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

  • DC FOCUSING COIL CURRENT S (APPROX.) — value 1

    110 mA

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

  • DC FOCUSING COIL CURRENT S (APPROX.) — value 2

    10 mA

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

  • DC ION TRAP CURRENT STANDARD COIL #111 (A PPROX.) — value 1

    111 mA

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

  • DC ION TRAP CURRENT STANDARD COIL #111 (A PPROX.) — value 2

    85 mA

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

  • DC ION TRAP CURRENT STANDARD COIL #111 (A PPROX.) — value 3

    50 mA

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

  • A VI SU AL E%TI NOTION OF UN DE ELECTED FOCUSED SPOT.

    0

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

  • BFOR STANDARD FOCUS LOLL N109. — value 1

    1011

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

  • BFOR STANDARD FOCUS LOLL N109. — value 2

    9

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

Other

  • MAXIMUM EXTERNAL CONDUCTIVE COA?I NG TO ANODE — value 1

    1

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

  • MAXIMUM EXTERNAL CONDUCTIVE COA?I NG TO ANODE — value 2

    750

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

  • MAXIMUM DC ANODE VOLTAGE

    0 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

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

  • MAXIMUM GRID #1 CIRCUIT RESISTANCE — value 2

    5

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

  • MAXIMUM GRID #1 CIRCUIT RESISTANCE — value 3

    0

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