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21CYP22

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 27.5 kV.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: DIHEPTAL12
Base pins: -
Nominal heater: 6.3 V / 1.6 A

Description

Sylvania 21CYP22 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: -
Socket code: DIHEPTAL12
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 1.6 A
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 plate voltage: 27500 V

Published Sylvania color-CRT ratings, capacitances, convergence and operating-design values extracted from 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
10 pF
CombinedCathodesToAllOtherElectrodes
16 pF
CommonFocusingGridsToAllOtherElectrodes
23 pF
PhosphorDotArrangement
Triangular dot trios
DisplayType
Three-color phosphor-dot shadow-mask

Other

AnodeVoltageMaximum
27500 V
FocusingGridVoltageMaximum
6000 V
Grid2VoltageMaximum
1000 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