Alternatives & variations Download PDF datasheet

19DQP4

Nineteen-inch black-and-white Pan-O-Ply television picture tube with integral implosion protection, low-voltage electrostatic focus, 114-degree magnetic deflection, and an aluminized P4 screen. The design eliminates a separate safety-glass window and improves picture contrast.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: B8H
Base pins: -
Nominal heater: 6.3 V / 450 mA

Description

RCA-19DQP4 is a black-and-white pan-o-ply picture tube which eliminates the need for either an i1ntegral protective window or a separate safety-glass window and its companion dust seal in the receiver. Thereby internal reflections are reduced; consequently, picture contrast is improved. Integral implesion protection in the pan-o-ply picture tube 1s provided by means of a formed rim band and a welded tension band around the periphery of the tube panel. The 19DQP4 1s a rectangular glass picture tube having an aluminized screen with nearly straight sides and slightly rounded corners. Features of the 19DQ@P4 include: ® Pan-0-Ply-—Integral Implosion Protection i 14° Magnetic Deflection Low-V¥oltage Electrostatic Focus Aluminized Screen Electron Gun Requiring No fon-Trap Magnet t1.625" Max. Overall Length 4. 125" Neck Length 12.000" x 15.187" Screen 6.3 Volt/4s50 Ma Heater ® 23 kv Max. Anode V

Socket description

Neoeightar 8-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B8H
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 450 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

Cathode-drive P4 picture tube with adjustable centering magnet.

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

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

i
14
i 14° Magnetic Deflection
6.3 Volt/4s50 Ma Heater
0 V
6.3 Volt/4s50 Ma Heater
®
23
® 23 kv Max. Anode Voltage
Focusing Method. . . . . . . . . . . . ,Electrostatic Diagonal
100
Focusing Method. . . . . . . . . . . . ,Electrostatic Diagonal. . . . . . . . . .. ... 18732" & .100°
Horizontal
17.562
Horizontal. . . . . - . . . . . . . 109° Diagonal. . . . . . . . .. . . ... ... 17.562"
Vertical, . o B5° Greatest width. .,
15.187
Vertical, . o B5° Greatest width. ., . . . . . . . . . . . . . 15.187"
Cathode to all other electrodes
172 pF
Cathode to all other electrodes . 5 pf Area. . . . . .. ... 172 L.
GridNo.l te all other electrodes
1 pF
GridNo.l te all other electrodes . 6 pf CBulbDDe‘..signaT‘.ion. A -R- - d s .1.1‘](1_‘,49'[:1
1 1500 max. pf aP esignation . . . . . . . . ma No.J1.21
21 pF
1 1500 max. pf aP esignation . . . . . . . . ma No.J1.21
Heater Current at
2085 V
Heater Current at 6.3 volts . . . . 450 % 20 ma Arrangement 1, (JEDEC ND-B7'2085
in the test circuit shown in Pig.] for the voltage (E) Pin
1
in the test circuit shown in Pig.] for the voltage (E) Pin 1: Heater
0.8 of rated heater voltage. Pin 3: erld N0l2
3
0.8 of rated heater voltage. Pin 3: erld N0l2
Anode Voltage . . . . . . . . . . J2
3000 V
Anode Voltage . . . . . . . . . . J23,000 max. volts conditions.
11,000 min. volts C Measured between the heater terminals.
11000 V
11,000 min. volts C Measured between the heater terminals.
Grld-No
9
Grld-No.4 Voltage: 9 Cathode drive is the operating condition in which
Negative value,
550 V
Negative value, . . . . . . . . 550 max. volts respect to grid No.l and the other electrodes.
. 550 max. volts The grid-No.4 voltage required for optimum focus
4 V
. 550 max. volts The grid-No.4 voltage required for optimum focus
Grid-No
200 V
Grid-No.2 Voltage . . . . . . .. 200 m?n volts of any individual tube will have a value anywhere
min. between
400 V
. min. between 0 and +400 volts with the combined grid-No.l
Negative peak value . , . .,
2 V
Negative peak value . , . ., . . 220 max. volts anode current of 200 microamperes on a 13-1/2-inch
Negative bias value
1 V
Negative bias value . . . . . . 155 max. volts by 18-inch pattern from an KCA-2F21 monoscope, or
Positive bias value
0 V
Positive bias value . 0 max. volts f ;f’“”ale“;' Ref ot ble P ]
Positive pealé value
4 V
Positive pealé value 2 max volts magnet should not exceed 2-1/4 inches, The specifieg
Heater Voltage
6.9 V
Heater Voltage . . . . . . . . . 6.9 max volts centering magnet compensates only for the effect
5.7 min. volts which mechanical tube tolerances may have on the
5.7 V
5.7 min. volts which mechanical tube tolerances may have on the
15 seconds. . . . . . . .. 450 max. volts 16000 volts
16000 V
15 seconds. . . . . . . .. 450 max. volts 16000 volts
perioj, e e e
300 V
perioj, e e e 300 max. volts The equipment manufacturer must determine and supply
Combined AC & DC Voltage
200 V
Combined AC & DC Voltage. . . 200 max. volts sation should preferably be applied as part of the
DC Component.,
100 V
DC Component., . . . . . . . . 100 max. volts magnetic field of the deflecting yoke.
Anode Voltage f(,
0 V
Anode Voltage f(, 000 volts X-Rodiation Warning., When operated at anode
Grid-No
16 V
Grid-No. 4 Vilt;g;e. T 900 volts voltages up to 16 kilovelts, this picture tube
Grid-No
300 V
Grid-No.2 Voltage tor o 300 volts does not;produce'any harmful X-radiation. However,
extinction Ef focused at voltages as high as
23
extinction Ef focused at voltages as high as 23 kilovolts (design-maximum
raster (See FPig
62 V
raster (See FPig.2). . . . . . . 28 to 62 volts value), shielding of the tube for X-radiation may
j . i of
16
j . i of 16 kilovolts.
Grid-No
1.5
Grid-No.1l Circuit Resistance., . . 1.5 max. megohms
Ef=
6.3 V
Ef=6.3 VOLTS
ANODE - TO-GRID—Ne.l VOLTS
20000 V
ANODE - TO-GRID—Ne.l VOLTS 212000 TO 20000
GRID—-No,
4 V
GRID—-No,4 -TO—-GRID—No.l VOLTS ADJUSTED FOR FOCUS.
GRID-No
2 V
GRID-No.2-TO-GRID-No.! VOLTS
oF ee-"‘f>°%’°»?§‘%.‘"’
5
oF ee-"‘f>°%’°»?§‘%.‘"’2?"?_ﬁ5,L?\/
92CM~-12294
-12294
92CM~-12294
IN INCHES AND HEIGHT BY NOT MORE THAN
16
IN INCHES AND HEIGHT BY NOT MORE THAN 1/16".

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
Heater current
450 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

Characteristic

Deflection angle
114 deg
Approximate

Capacitance

Cathode to all other electrodes capacitance
5 pF
Approximate