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23MP4

Large P4 monochrome television picture tube designed for high-voltage direct-view service, using manufacturer-specified focusing, magnetic deflection, and beam-control arrangements for type 23MP4.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: 8HR
Socket code: B8H
Base pins: 7
Nominal heater: 6.3 V / 30 A

Description

23-inch direct-view monochrome television CRT with electrostatic focus, magnetic deflection, aluminized P4 screen, and gray/filter faceplate construction.

Socket description

Neoeightar 8-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8HR
Socket code: B8H
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 30 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8HR - 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: 220 V

CRT-specific ratings, operating conditions, capacitances, focus/deflection, cutoff, optical, and screen data are retained in section parameters.

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

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
600 mA
Nominal
Maximum Plate Voltage
22000 V
UltorVoltageMaximum
22000 V

Characteristic

HeaterWarmupCurrentNominal
600 mA
At 6.3 V

Data set 02

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

Heater Voltage
6.3 V
Heater Current
600 mA

Other

Maximum Anode Voltage
22000 V
Grid2 Voltage
550 V

Data set 03

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

Focusing method
Electrostatic
Deflection method
Magnetic
Horizontal deflection angle
100 deg
Diagonal deflection angle
114 deg
Vertical deflection angle
83 deg
Fluorescence
White
Persistence
Short to medium
Heater voltage
6.3 V
Heater current
600 mA

Construction

Phosphor
Aluminized P4

Other

Maximum anode voltage
22000 V
Typical anode voltage
16000 V
Typical focus-electrode voltage maximum
400 V
Typical grid2 voltage
300 V
Cutoff voltage range
-35 to -72 V
Grid1 circuit resistance maximum
1.5 Mohm
Anode voltage minimum
11000 V
Focus-electrode voltage minimum
-550 V
Focus-electrode voltage maximum
1100 V
Grid2 voltage minimum
200 V
Grid2 voltage maximum
550 V
X-radiation precaution
Operate within published maximum anode-voltage rating; source carries X-radiation warning at elevated EHT.

Capacitance

Grid1-to-all capacitance
6 pF
External conductive coating to anode capacitance maximum
2500 pF

Application

Application
Monochrome television picture display

Data set 04

1971 RCA HB3 Binder 1 of 7

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

Heater Current at 6.3 volts — published value 1
6.3 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Heater Current at 6.3 volts — published value 2
600 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Heater Current at 6.3 volts — published value 3
30 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
1 Heater War~Up Time (Average) — published value 1
1
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
1 Heater War~Up Time (Average) — published value 2
11
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid No.1 to all other electrodes
6
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
External conductive coating to ultor
1700 mA
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Light transmission at center (Approx.)
78
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
With any uitor voltage (Ec gk) between ii000 and 22000 volts
22000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
and grid-No.2 voltage (Ec2k>• between 220 and ggo volts
220 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
for focus — published value 1
0 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
for focus — published value 2
400 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.4 Current — published value 1
-25
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.4 Current — published value 2
25
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.2 Current — published value 1
-15
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.2 Current — published value 2
15
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.4 Voltage for focus — published value 1
0 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.4 Voltage for focus — published value 2
400 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Voltage for focus — published value 1
0 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Voltage for focus — published value 2
400 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
No.1 voltage of
18000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Voltage for focus• — published value 1
0 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Voltage for focus• — published value 2
400 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
of focused raster — published value 1
36 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
of focused raster — published value 2
78 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
~oY yrid-No.4-to-grid-No. 1) voltage between o and 400 volts under — published value 1
1 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
~oY yrid-No.4-to-grid-No. 1) voltage between o and 400 volts under — published value 2
400 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
adjusted to produce an ultor current of 200 microamperes
200 uA
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
u ndeflect ed focused spot will fall within a circle having a 3/e-inch
3
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
X-Ray Warning
16 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
involve voltages in excess of 16 ki lovolts
16 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
SCREEN WIDTH 194 MIN
194
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
ULTOR VOLTS=11000 TO 22000 — published value 1
11000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
ULTOR VOLTS=11000 TO 22000 — published value 2
22000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID-Ns 4 VOLTS ADJUSTED FOR FOCUS
4 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID-N°2 VOLTS
2 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
ULTOR—TO—GRID—NCI VOLTS=11000 TO 22000 — published value 1
11000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
ULTOR—TO—GRID—NCI VOLTS=11000 TO 22000 — published value 2
22000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
ULTOR-TO-GRID-NQI VOLTS= 16000 — published value 1
16000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
ULTOR-TO-GRID-NQI VOLTS= 16000 — published value 2
16000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
CIE COORDINATES OF SCREEN~X=0.287,Y=0.315 — published value 1
0.287
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
CIE COORDINATES OF SCREEN~X=0.287,Y=0.315 — published value 2
0.315
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
ULTOR-TO-GRID-Nel — published value 1
11000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
ULTOR-TO-GRID-Nel — published value 2
22000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
VOLTS=11000 TO 22000 — published value 1
11000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
VOLTS=11000 TO 22000 — published value 2
22000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
RESPECT TO GRID N~1 TO GIVE
1
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

Other

ULTOR-TO-GRID-No.l VOLTAGE
22000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID-No.2-TO-GRID-No.i VOLTAGE
700 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID-No.2-TD-CATHODE VOLTAGE
550 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.l-Circuit Resistance
1.5 mA
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
operation at voltages as high as 22 ki lovolts (Design-maximum
22 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.