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

21AXP22

P22 color television picture tube documented for high-voltage direct-view color display service, using multiple electron guns and a multicolor phosphor screen in the 21AXP22 design.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
14AH
Socket code
DIHEPTAL12
Base pins
12
Nominal heater
6.3 V / 1.8 A

Description

Sylvania 21AXP22 21-inch color television CRT with three electron guns, magnetic deflection/convergence, electrostatic focus, and P22 phosphor-dot screen. Published maximum ratings, interelectrode capacitances, convergence information, and equipment design ranges were extracted.

Socket description

Medium-shell Diheptal 12-contact CRT base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
14AH
Socket code
DIHEPTAL12
Base pins
12
Nominal heater voltage
6.3 V
Nominal heater current
1.8 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

14AH - 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
25000 V

Cathode-ray electron-gun/screen system; anode/ultor maximum promoted to MaxPlateVoltage when explicitly published. Explicit X-ray warning/precaution or X-radiation characteristic is present in the supplied source.

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

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    1.8 A

  • FocusingMethod

    Electrostatic

  • DeflectionMethod

    Magnetic

  • ConvergenceMethod

    Magnetic

  • ElectronGunCount

    3

  • Phosphor

    Aluminized P22 blue-green-red phosphor-dot

  • Grid1OfOneGunToAllOtherElectrodes

    7 pF

  • CombinedCathodesToAllOtherElectrodes

    16 pF

  • CommonFocusingGridsToAllOtherElectrodes

    9 pF

  • PhosphorDotArrangement

    Triangular dot trios

  • DisplayType

    Three-color phosphor-dot shadow-mask

Other

  • AnodeVoltageMaximum

    27500 V

  • FocusingGridVoltageMaximum

    6600 V

  • Grid2VoltageMaximum

    880 V

  • Grid1NegativeBiasMagnitudeMaximum

    440 V

  • Grid1PositivePeakVoltageMaximum

    2 V

  • HeaterCathodeVoltageMaximum

    450 V

    Warmup<=15s;HeaterNegative

  • HeaterCathodeVoltageMaximum

    200 V

    AfterWarmup

  • HeaterCathodeVoltageMaximum

    200 V

    HeaterPositive

  • Anode Voltage

    25000 V

    EquipmentDesignRangeReference

Data set 02

1971 RCA HB3 Binder 1 of 7

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Heater Voltage

    6.3 V

    Nominal heater voltage

  • Heater Current

    1.8 A

    Nominal heater current

  • Phosphor

    P22

    Published phosphor designation

  • Voltage

    6.3 V

    Voltage 6.3 ac or do volts

  • Current

    10 A

    Current 1.8 t 10% amp

  • ULTOR-TO-CATHODE lOf each gun) VOLTAGE

    25000 V

    ULTOR-TO-CATHODE lOf each gun) VOLTAGE. 25000 max. volts

  • GRID-No.3-TO-CATHODE (Of each gun) VOLTAGE

    6000 V

    GRID-No.3-TO-CATHODE (Of each gun) VOLTAGE 6000 max. volts

  • GRID-No.2-TO-CATHODE VOLTAGE (Each gun)

    800 V

    GRID-No.2-TO-CATHODE VOLTAGE (Each gun) 800 max. volts

  • After equipment warm-up period

    180 V

    After equipment warm-up period 180 max. volts

  • Heater positive with respect to cathode

    180 V

    Heater positive with respect to cathode 180 max. volts

  • (Of each gun) Voltage

    21.2 V

    (Of each gun) Voltage 15.2% to 21.2 of volts

  • ~ A value oP average ultor current per gun higher than

    500 µA

    ~ A value oP average ultor current per gun higher than 500 microamperes

  • general, the ultor voltage should not De less than

    20000 V

    general, the ultor voltage should not De less than 20000 volts.

  • For ultor voltage of a0000 a5000 volts

    0 V

    For ultor voltage of a0000 a5000 volts

  • Voltage

    3600 to 5300 V

    Voltage 3040 to 4240 3600 to 5300 volts

  • for raster cutoff

    130 to 370 V

    for raster cutoff 130 to 370 130 to 370 volts

  • cathode voltage of

    -45 to -100 V

    cathode voltage of 200 volts -45 to -100 -45 to -100 volts

  • 50000 ohms. This resistance should be capable of withstanding

    50000 Ω

    50000 ohms. This resistance should be capable of withstanding

  • GRID-N~2-TO-CATHODE VOLTS

    2 V

    GRID-N~2-TO-CATHODE VOLTS

  • _GRID -N'2 -TO -CATHODE (OF EACH GUN) VOLTS=EC2K _

    2 V

    _GRID -N'2 -TO -CATHODE (OF EACH GUN) VOLTS=EC2K _

  • GRID-N'

    3 V

    GRID-N' 3-TO-CATHODE (OF EACH GUN) VOLTS =ADJUSTED FOR

  • Voltage

    63 V

    Voltage 63 ac or do volts

  • ULTOR-TO-CATHODE (Of each gun) VOLTAGE

    25000 V

    ULTOR-TO-CATHODE (Of each gun) VOLTAGE. 25000 max. volts

  • GRID-No.}TO-CATHODE (Of each gun} VOLTAGE

    6000 V

    GRID-No.}TO-CATHODE (Of each gun} VOLTAGE. 6000 max. volts

  • Grid-No. l-Circuit Resistance (Each gunl

    1.5 MΩ

    Grid-No. l-Circuit Resistance (Each gunl 1.5 max. megohms

Construction

  • Focusing Method

    Electrostatic

    Published focusing method

  • Deflection Method

    Magnetic

    Published deflection method