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19DRP4

Nineteen-inch Pan-O-Ply monochrome television picture tube with low-voltage electrostatic focus, 114-degree magnetic deflection, white P4 screen, and a 600 mA controlled-warm-up heater. Integral implosion protection supports receiver safety without a separate protective window.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

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

Description

19DRP4 Picture Tube

The 19DRP4 is a rectangular glass picture tube designed for television receiver applications. It features an aluminized screen, low-voltage electrostatic focus, and a wide-angle magnetic deflection system. The tube incorporates integral implosion protection and a controlled heater warm-up time, making it suitable for modern television chassis designs.

Construction and Implosion Protection

The 19DRP4 is constructed as a rectangular glass cathode-ray tube. It features an aluminized screen that enhances brightness and contrast by reflecting light forward that would otherwise be lost to the interior of the tube.

A key mechanical feature of the 19DRP4 is its PAN-O-PLY integral implosion protection system. This system is constructed using a formed rim and welded tension bands placed around the periphery of the tube panel. This structural reinforcement eliminates the need for a separate safety glass window or an integral protective window in the television cabinet, simplifying receiver design and reducing reflections.

Electron Gun, Focus, and Deflection

The tube's electron gun is designed for efficient operation without the complexity of external magnetic components:

Focusing Method: The tube utilizes low-voltage electrostatic focus, which allows the focus voltage to be adjusted or maintained at a low potential relative to the high-voltage anode.
Deflection: It employs a wide-angle 114° magnetic deflection system, which allows for a shorter overall tube length and a shallower television cabinet design.
Ion-Trap: The electron gun design does not require an external ion-trap magnet, simplifying installation and alignment procedures.

Heater Characteristics

The 19DRP4 features a heater with a controlled warm-up time, which is particularly useful in series-string heater arrangements to prevent voltage surges across other tubes during start-up.

Heater Parameter	Value
Heater Voltage	6.3 V
Heater Current	600 ± 30 mA
Warm-up Feature	Controlled warm-up time

Related Designations

The 19DRP4 is closely related to other picture tubes in its family. Specifically, it is identical to the 19DQP4 picture tube in all physical and electrical characteristics, with the sole exception of the heater current rating.

Technical Summary

The 19DRP4 is a rectangular glass television picture tube featuring a 114° magnetic deflection angle, low-voltage electrostatic focus, and an aluminized screen. Its PAN-O-PLY integral implosion protection system uses a formed rim and welded tension bands to eliminate the need for external safety glass. Operating with a 6.3 V heater drawing 600 ± 30 mA, the tube features a controlled heater warm-up time and does not require an ion-trap magnet. It shares its design with the 19DQP4, differing only in its heater current specification.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
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: 23000 V
Max screen voltage: 550 V

Same as 19DQP4 except 600 mA controlled-warm-up heater.

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
Heater warm-up time
11 s
Maximum anode/ultor voltage
23000 V
Minimum anode/ultor voltage
11000 V
Typical anode/ultor voltage
16000 V
PictureTubeService
Maximum grid No.2 voltage
550 V
Typical grid No.2 voltage
300 V
PictureTubeService
Focus-voltage range minimum
0 V
OptimumFocus
Focus-voltage range maximum
400 V
OptimumFocus
Visual-extinction voltage range minimum
28 V
FocusedRasterExtinction
Visual-extinction voltage range maximum
62 V
FocusedRasterExtinction
Maximum grid No.1 circuit resistance
1.5 megohm
X-ray shielding warning
Present
HighAnodeVoltage
Maximum negative grid No.1 peak voltage
220 V
Maximum negative grid No.1 bias magnitude
155 V
Maximum positive grid No.1 peak voltage
2 V
Peak heater-cathode voltage during warm-up
450 V
HeaterNegative;Warmup<=15s
Peak heater-cathode voltage after warm-up
300 V
HeaterNegative
Peak heater-cathode voltage heater positive
200 V
HeaterPositive
Adjustable centering magnet field strength maximum
8 gauss
Approximate

Construction

Focusing method
LowVoltageElectrostatic
Deflection method
Magnetic
Phosphor
P4
Screen type
White
P4
Ion-trap magnet required
No

Characteristic

Deflection angle
114 deg
Approximate

Capacitance

Cathode to all other electrodes capacitance
5 pF
Approximate