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

21CYP22A

Twenty-one-inch color television picture tube with three electron guns, magnetic deflection and convergence, electrostatic focusing, and a P22 phosphor-dot screen. Published high-voltage anode capability reaches about 25 kV.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
14AL
Socket code
-
Base pins
12
Nominal heater
6.3 V / 1.6 A

Description

Sylvania 21CYP22A 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.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
14AL
Socket code
-
Base pins
12
Nominal heater voltage
6.3 V
Nominal heater current
1.6 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

14AL - 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

    1.6 A

  • FocusingMethod

    Electrostatic

  • DeflectionMethod

    Magnetic

  • ConvergenceMethod

    Magnetic

  • ElectronGunCount

    3

  • Phosphor

    Aluminized P22 blue-green-red phosphor-dot

  • Grid1OfOneGunToAllOtherElectrodes

    7 pF

  • CombinedCathodesToAllOtherElectrodes

    16 pF

  • CommonFocusingGridsToAllOtherElectrodes

    23 pF

  • PhosphorDotArrangement

    Triangular dot trios

  • DisplayType

    Three-color phosphor-dot shadow-mask

Other

  • AnodeVoltageMaximum

    27500 V

  • FocusingGridVoltageMaximum

    6600 V

  • Grid2VoltageMaximum

    660 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

    1.6 A

    Nominal heater current

  • Phosphor

    P22

    Published phosphor designation

  • Voltage (AC or DC)•

    63 V

    Voltage (AC or DC)• 63 volts

  • Current at

    16 A

    Current at 6.3 volts 16 amp

  • External conductive coating to grid No.6

    2500 pF

    External conductive coating to grid No.6 2500 max. pF

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

    25000 V

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

  • VOLTAGE

    6000 V

    VOLTAGE. . 6000 max. volts

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

    600 V

    GRID-No.2-TO-CATHODE VOLTAGE (Each gun). . 600 max. volts

  • Heater positive with respect to cathode

    180 V

    Heater positive with respect to cathode 180 max, volts

  • (Of each gun) Voltage

    4 V

    (Of each gun) Voltage. 16.8%to20`K of E~4keacn gun volts

  • Grid-No.3 Current

    45 µA

    Grid-No.3 Current -45 to +45 µa

  • For uLtorvoltage of Z0000 ag000 volts

    0 V

    For uLtorvoltage of Z0000 ag000 volts

  • (Of each gun) Voltage

    4200 to 5000 V

    (Of each gun) Voltage. 3360 to 4000 4200 to 5000 volts

  • voltage of

    -70 V

    voltage of -70 volts

  • for raster cutoff

    130 to 370 V

    for raster cutoff. 130 to 370 130 to 370 volts

  • voltage of

    -45 to -100 V

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

  • should not be less than

    0 Ω

    should not be less than 50,000 ohms. These resistances should

  • Circuit Resistance (Each gun)

    75 MΩ

    Circuit Resistance (Each gun) 0 75 max. megohm

  • heater voltage of

    5.5 V

    heater voltage of 5.5 volts with variations not exceeding 3 6f under

  • * Connect high-voltage supply to this cap and also connect

    0 Ω

    * Connect high-voltage supply to this cap and also connect 50,000-ohm

  • general, the ultor voltage should not De less than

    0 V

    general, the ultor voltage should not De less than 20,000 volts.

  • GRID—N43 —TO —CATHODE (OF EACH GVN~ VOLTS=ADJUSTED

    3 V

    GRID—N43 —TO —CATHODE (OF EACH GVN~ VOLTS=ADJUSTED

  • GRID—N~2—TO—CATHODE VOLTS

    2 V

    GRID—N~2—TO—CATHODE VOLTS

  • GRID-Ns2-TO-GRID-Nsl VOLTS GRID-N42-TO-CATHODE VOLTS

    2 V

    GRID-Ns2-TO-GRID-Nsl VOLTS GRID-N42-TO-CATHODE VOLTS

Construction

  • Focusing Method

    Electrostatic

    Published focusing method

  • Deflection Method

    Magnetic

    Published deflection method