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24CP4B

Twenty-four-inch rectangular glass television picture tube with magnetic focusing, 90-degree magnetic deflection, and an aluminized P4 white screen. RCA documentation supports high-voltage direct-view monochrome receiver service.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: DUODECAL5
Base pins: -
Nominal heater: 6.3 V / 600 mA

Description

Rectangular glass television picture tube with aluminized P4 white screen, magnetic focus, and 90-degree magnetic deflection.

Socket description

Small-shell Duodecal 5-contact CRT base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: DUODECAL5
Base pins: -
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 plate voltage: 22000 V
Max screen voltage: 600 V

Television picture CRT; magnetic focus and 90-degree magnetic deflection.

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
600 mA
Maximum anode voltage
22000 V
Typical anode voltage
18000 V
TelevisionPictureTube
Grid #1 extinction range minimum
-72 V
VisualExtinction
Grid #1 extinction range maximum
-28 V
VisualExtinction
Peak heater-cathode voltage, heater positive
200 V

Construction

Focusing method
Magnetic
Deflection method
Magnetic
Phosphor
P4
AluminizedWhite
Ion-trap magnet required
No

Characteristic

Deflection angle
90 deg
Faceplate light transmission
75 %
Approximate

Capacitance

Grid #1 to all other electrodes capacitance
6 pF
Cathode to all other electrodes capacitance
5 pF
External conductive coating to anode capacitance minimum
2000 pF
External conductive coating to anode capacitance maximum
2500 pF