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25AJP22

Twenty-five-inch color television picture tube with three electrostatically focused guns, magnetic convergence/deflection, and an aluminized P22 tricolor screen. High-voltage direct-view construction and shadow-mask color presentation place it firmly in color receiver service.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: DUODECAL12
Base pins: -
Nominal heater: 6.3 V / 900 mA

Description

25-inch rectangular color picture tube with three electrostatic-focus guns, magnetic convergence/deflection, and P22 rare-earth tricolor phosphor-dot screen.

Socket description

Duodecal 12-contact color CRT base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: DUODECAL12
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 900 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 plate voltage: 27500 V
Max screen voltage: 1000 V

Three-gun color CRT; focus electrode up to 6000 V.

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

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
Heater current
900 mA
ThreeGuns
Maximum anode voltage
27500 V
Maximum focusing-electrode voltage
6000 V
Typical anode voltage
25000 V
ColorPictureTube
Focusing-electrode voltage minimum
16.8 % of anode
FocusRange
Focusing-electrode voltage maximum
20 % of anode
FocusRange
X-ray shielding warning
Present
HighAnodeVoltage

Construction

Focusing method
Electrostatic
Focus lens
Bipotential
Convergence method
Magnetic
Deflection method
Magnetic
Phosphor
P22
Tricolor

Characteristic

Persistence
Medium Short
Diagonal deflection angle
89 deg
Approximate
Horizontal deflection angle
78 deg
Approximate
Vertical deflection angle
63 deg
Approximate
Faceplate light transmission at center
42 %
Approximate

Capacitance

Grid No.1 of any gun to all other electrodes
6 pF
Approximate
Grid No.3 to all other electrodes
6.5 pF
Approximate
All cathodes to all other electrodes
15 pF
Approximate