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Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Cathode Ray ·CathodeRay

24AOP4

Large P4 monochrome television picture tube in the 24-inch class, designed for high-voltage direct-view service with manufacturer-specified focusing, magnetic deflection, and beam-control characteristics for type 24AOP4.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
NEOEIGHTAR7
Base pins
-
Nominal heater
6.3 V / 450 mA

Description

Twenty-four-inch lightweight 110-degree television CRT with electrostatic focus, magnetic deflection, gray-filter faceplate, aluminized P4 screen, and 450 mA heater.

Socket description

Small-button Neoeightar 7-contact CRT base family

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
NEOEIGHTAR7
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 screen voltage
300 V

CRT electron-gun/display section. MaxPlateVoltage stores published maximum anode voltage; MaxScreenVoltage stores published maximum Grid No. 2 voltage where available.

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

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Maximum Grid No. 2 voltage

    300 V

    Published maximum Grid No. 2 voltage

  • Anodevoltage

    22000 V

    Anodevoltage ......... 22,000Volts dc

  • Grid No. 4 Voltage (Focusing Electrode) . -550 to +

    1100 V

    Grid No. 4 Voltage (Focusing Electrode) . -550 to +1100 Volts dc

  • GridNo. 2Voltage

    550 V

    GridNo. 2Voltage . 550 Volts dc

  • During Warm-up Period Not to Exceed

    15 s

    During Warm-up Period Not to Exceed 15 Seconds 450 Volts SEPTEMBER, 1958

  • After Equipment warm-up period

    200 V

    After Equipment warm-up period. . 200 Volts PAGE 1 OF 3

  • Heater positive with Respect to cathode

    200 V

    Heater positive with Respect to cathode . . 200 Volts

  • Anode voltage

    16000 V

    Anode voltage ........ 16,000 Volts

  • Grid No. 4 Voltage for Focus

    400 V

    Grid No. 4 Voltage for Focus .... 0 to +400 Volts

  • Grid No. 2 Voltage

    300 V

    Grid No. 2 Voltage ....... . 300 Volts

  • Grid No. 1` Voltage Required for Cutoff3 . -35 to

    -72 V

    Grid No. 1` Voltage Required for Cutoff3 . -35 to -72 Volts

Characteristic

  • Heater current

    450 mA

    Published heater current

  • Faceplate . Gray Filter Glass

    6.3 V

    Faceplate . Gray Filter Glass 6.3 Volt, 450 Ma. Heater

  • Heater Voltage

    6.3 V

    Heater Voltage 6.3 Volts

  • Heater warm~up Timel

    11 s

    Heater warm~up Timel . 11 Seconds

CircuitValue

  • Grid No. 1 Circuit Resistance

    1.5 Mohm

    Grid No. 1 Circuit Resistance .... 1.5 Megohms Max.