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23CP4

Twenty-three-inch direct-view monochrome television picture tube with electrostatic focusing, magnetic deflection, and an aluminized P4 screen. Manufacturer documentation places it in the high-voltage receiver CRT family used for bright rectangular picture presentation.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: NEOEIGHTAR7
Base pins: 7
Nominal heater: 6.3 V / 600 mA

Description

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

Socket description

Small-button Neoeightar 7-contact CRT base family

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: NEOEIGHTAR7
Base pins: 7
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: 12000 V
Max screen voltage: 500 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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

Phosphor
P4
Deflection method
Magnetic
Focusing method
Electrostatic

Data set 02

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
99 deg
Diagonal deflection angle
110 deg
Vertical deflection angle
82 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
Focus-electrode voltage minimum
-550 V
Focus-electrode voltage maximum
1100 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 03

1971 RCA HB3 Binder 1 of 7

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

Voltage (AC or DC) — published value 1
6.3 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Voltage (AC or DC) — published value 2
10 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
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.
Current at 6.3 volts — published value 2
0.6 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Current at 6.3 volts — published value 3
5 V
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.
Total light transmission (Approx )
40
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
nal deflection — published value 1
50
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
nal deflection — published value 2
1
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
nal deflection — published value 3
4
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
zontal deflection — published value 1
4
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
zontal deflection — published value 2
35
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
zontal deflection — published value 3
1
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
zontal deflection — published value 4
4
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
cal deflection — published value 1
45
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
cal deflection — published value 2
1
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
cal deflection — published value 3
2
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
cal deflection — published value 4
35
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
nal deflection — published value 1
2
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
nal deflection — published value 2
31
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
nal deflection — published value 3
1
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
nal deflection — published value 4
2
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
zontal deflection — published value 1
4
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
zontal deflection — published value 2
26
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
zontal deflection — published value 3
1
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
zontal deflection — published value 4
2
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
cal deflection — published value 1
4
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
cal deflection — published value 2
18
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
cal deflection — published value 3
1
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
cal deflection — published value 4
2
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
and grid—No.2 voltage (6~cZk) between zoo and goo volts
6 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
focus* — published value 1
0 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
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.
focused raster — published value 1
-44 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
focused raster — published value 2
-94 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
With any ultor-to-grid-No.1 voltage f8cgg il between 12000
12000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
and 20000 volts and grid-No.2-to-grid-No.1 voltage 18c2gi1 — published value 1
20000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
and 20000 volts and grid-No.2-to-grid-No.1 voltage 18c2gi1 — published value 2
18 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.
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.
focused raster — published value 1
42 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
focused raster — published value 2
78 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
i ninux ultor (or ultor—to—gqrid—No. 1) voltage is,11 000 volts below — published value 1
1 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
i ninux ultor (or ultor—to—gqrid—No. 1) voltage is,11 000 volts below — published value 2
11000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
focus of any individual tube may have a value anywhere Det wean 0 and
0 mA
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
No.2 (or grid—No.2—to—grid—Xo. 1) voltage, within design ranges sno wn
1 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
u ndeflected Focused spot will fall within a circie having a 3/9—inch — published value 1
3
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
u ndeflected Focused spot will fall within a circie having a 3/9—inch — published value 2
9
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
that the ea rth~s magnetic field can cause as much as 1/2—inch deflection — published value 1
1 mA
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
that the ea rth~s magnetic field can cause as much as 1/2—inch deflection — published value 2
2 mA
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
SEE NOTE 6
6
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
ULTOR VOLTS = 12000 TO 20000 — published value 1
12000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
ULTOR VOLTS = 12000 TO 20000 — published value 2
20000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID—N~4 VOWS ADJUSTED FOR FOCUS
4
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-N~IVOLTS=12000 TO 20000 — published value 1
12000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
ULTOR-TO-GRID-N~IVOLTS=12000 TO 20000 — published value 2
20000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID—N~4-TO-GRID-Nel VOLTS ADJUSTED FOR FOCUS
4 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID —Ns 2—TO—GRID—N~1 VOLTS — published value 1
2 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID —Ns 2—TO—GRID—N~1 VOLTS — published value 2
1 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
UITOR—TO—GRID—N41 VOLTS=16000 — published value 1
16000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

Other

GRID-No.2 VOLTAGE
500 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Heater positive with respect to cathode
180 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.
GRID-No.2-TO-GRIC-No.l VOLTAGE
640 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID-No.2-TO-CATHODE VOLTAGE
500 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Heater positive with respect to cathode
180 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.