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Specialized - Cathode Ray ·CathodeRay

21AYP4

Large P4 monochrome television picture tube documented for high-voltage direct-view service, using magnetic deflection and manufacturer-specified focusing and beam-control arrangements for type 21AYP4.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B12D
Base pins
5
Nominal heater
6.3 V / 600 mA

Description

Direct-view cathode-ray picture tube for television display service. Electrical ratings, operating conditions, capacitances, optical data, and construction details were extracted from the supplied datasheet.

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
5
Nominal heater voltage
6.3 V
Nominal heater current
600 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
5 V

Published CRT ratings, operating conditions, capacitances, optical and deflection data are retained 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

  • Heater voltage

    6.3 V

    Nominal

  • Heater current

    600 mA

    Nominal

  • Maximum anode voltage

    18000 V

  • Maximum grid 2 voltage

    500 V

  • Typical anode voltage

    18000 V

    Typical operating conditions

  • Typical grid 2 voltage

    500 V

    Typical operating conditions

Characteristic

  • Diagonal deflection angle

    77 deg

Capacitance

  • Cathode to all other electrodes

    1 pF

    Approximate

  • Grid 1 to all other electrodes

    6 pF

    Approximate

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

  • CAPACITANCE VALUES, IT IS IDENTICAL TO THE 21XP4. ~ITS FEATURES INCLUDE

    21

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • GRID #1 TO ALL OTHER ELECTRODES — value 1

    1

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • GRID #1 TO ALL OTHER ELECTRODES — value 2

    6

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MiNiF~UM EXTERNAL CCND UCTIVE COATING TO ANODE

    750

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • HEATER

    6.3 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • HEATERPOSITIVE WITH RESPECT TO CATHODE

    18 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC GRID #4 VOLTA GE A — value 1

    4 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC GRID #4 VOLTA GE A — value 2

    64 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC GRID #4 VOLTA GE A — value 3

    352 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC GRID #2 VOLTAGE — value 1

    2 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC GRID #2 VOLTAGE — value 2

    3 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC GRID #1 VOLTAGE S — value 1

    1 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC GRID #1 VOLTAGE S — value 2

    2 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC GRID #1 VOLTAGE S — value 3

    2 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC ION TRAP MAGNET STANDARD COIL #117 (APPROX.) — value 1

    117 mA

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC ION TRAP MAGNET STANDARD COIL #117 (APPROX.) — value 2

    30 mA

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC ION TRAP MAGNET STANDARD COIL #117 (APPROX.) — value 3

    40 mA

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • DC ION TRAP MAGNET RATED STRENGTH

    35 mA

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

Other

  • MAXIMUM EXTERNAL CONDUCTIVE COATING TO ANODE

    2500 mA

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM DC GRID #4 VOLTAGE — value 1

    4 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM DC GRID #4 VOLTAGE — value 2

    -500 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM DC GRID #2 VOLTAGE — value 1

    2 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM DC GRID #2 VOLTAGE — value 2

    5 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM GRID #1 VOLTAGE

    1 V

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM GRID #1 CIRCUIT RESISTANCE — value 1

    1 mA

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM GRID #1 CIRCUIT RESISTANCE — value 2

    1 mA

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.

  • MAXIMUM GRID #1 CIRCUIT RESISTANCE — value 3

    4 mA

    Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.