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23BQP4

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 / 5 A

Description

The Sylvania 23BQP4 is a 23-inch aluminized P4 television cathode-ray tube with electrostatic focus and magnetic deflection.

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: 5 A
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

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

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

Heater Voltage
6.3 V
Heater Current
450 mA
Heater Warm-up Time
11 s
Focusing Method
Electrostatic text
Deflection Method
Magnetic text
Horizontal Deflection Angle
99 deg
Approximate
Vertical Deflection Angle
82 deg
Approximate
Diagonal Deflection Angle
110 deg
Approximate
Phosphor
Aluminized P4 text
Fluorescence
White text
Persistence
Short to Medium text
Light Transmittance
40 percent
Approximate
Cathode-to-All Capacitance
5 pF
Approximate
Grid1-to-All Capacitance
6 pF
Approximate
External Coating-to-Anode Capacitance Minimum
2000 pF
External Coating-to-Anode Capacitance Maximum
2500 pF

Other

Maximum Anode Voltage
23000 V
Minimum Anode Voltage
12000 V
Maximum Grid2 Voltage
550 V
Maximum Heater-Cathode Voltage During Warmup
450 V
Duration<=15s
Maximum Heater-Cathode Voltage After Warmup
200 V
Typical Anode Voltage
16000 V
Typical Grid2 Voltage
400 V
Focus Voltage Minimum
0 V
Focus Voltage Maximum
400 V
Cutoff Voltage Minimum
-94 V
Cutoff Voltage Maximum
-46 V
Maximum Grid1 Circuit Resistance
1.5 Mohm
Drive Mode
Grid Drive text

Data set 02

1971 RCA HB3 Binder 1 of 7

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

LOW-VOLTAGE ELECTROSTATIC FOCUS
10 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 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
450 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
5 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Heater Warm-Up Time (Average)
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.
Light transmission (Approx.)
40
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Projected Area of Screen
282
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-N o.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-N o.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.
extinction of focused raster — published value 1
-35 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
extinction of focused raster — published value 2
-72 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

Other

External conductive coating to ultor
2500 mA
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
ULTOR VOLTAGE
23000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID-No.2 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.