Alternatives & variations Download PDF datasheet

23EP4

Twenty-three-inch direct-view monochrome television picture tube with electrostatic focusing, magnetic deflection, and high-voltage operation. Manufacturer data documents its large-screen receiver-display construction, optical characteristics, and picture-tube operating limits.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: 8KP
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: 8KP
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

8KP - 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: 20000 V
Max screen voltage: 64 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

Characteristic

Heater Voltage
6.3 V
Heater Current
600 mA

Other

Maximum Anode Voltage
22000 V
Grid2 Voltage
550 V

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
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
50 V
Cutoff voltage range
+47 to +52 V
Grid1 circuit resistance maximum
1.5 Mohm
Anode voltage minimum
13200 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.
Grid No.l 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
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.
iontal deflection — published value 1
3
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
iontal deflection — published value 2
4
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
iontal deflection — published value 3
26
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
iontal deflection — published value 4
1
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.
Do Not Use
0
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Mich any ultor-to-grid-No.i voltage (Ec5g 11 between ia000a
11 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
and a0000 volts and grid-No.a-to-grid No.1 voltage (Eczg 11
11 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.
No.i voltage of — published value 1
36000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
No.i voltage of — published value 2
18 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Ho.i voltage of
5 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No. 4-to
4
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.
Voltage for focus* — published value 3
0 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Voltage for focus* — published value 4
400 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
fintiaua ultor—to—grid—No.i voltage is 11,000 volts below which LhC — published value 1
11 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
fintiaua ultor—to—grid—No.i voltage is 11,000 volts below which LhC — published value 2
0 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
to-gritl—xo.i voltage is never less than 11.000 volts
11 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
u nd eflected 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.
that the earth's mag net is 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 earth's mag net is 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.
ULTOR-TO-GRID-Nsl VOLTS=16000
16000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID-Ns!2-TO-GRID-N>:I VOLTS
2 V
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.
GRID-N=2-TO-GRID-N$I VOLTS=50 — published value 1
2 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID-N=2-TO-GRID-N$I VOLTS=50 — published value 2
50 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
ULTOR-TO-GRID- Nsl VOLTS=16000
16000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID-N'2-TO-GRID- N'I VOLTS=50 — published value 1
2 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID-N'2-TO-GRID- N'I VOLTS=50 — published value 2
50 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

Other

ULTOR-TO-GRID-No.1 VOLTAGE
20000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRIC-No.2-TO-GRID-No.1 VOLTAGE
64 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 — published value 1
1 mA
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.l-Circuit Resistance — published value 2
5 mA
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.