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
450 mA
Other
Maximum Anode Voltage
22000 V
Grid2 Voltage
70 V
Specialized - Cathode Ray ·CathodeRay
23JP4
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 23JP4.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- 7FA
- Socket code
- B12A
- Base pins
- 1
- Nominal heater
- 6.3 V / 25 A
Description
23-inch direct-view monochrome television CRT with electrostatic focus, magnetic deflection, aluminized P4 screen, and gray/filter faceplate construction.
Socket description
Duodecal 12-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 7FA
- Socket code
- B12A
- Base pins
- 1
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 25 A
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
7FA - 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
- 50 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 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
450 mA
Construction
Phosphor
Aluminized P4
Other
Maximum anode voltage
22000 V
Typical anode voltage
16000 V
Typical focus-electrode voltage maximum
250 V
Typical grid2 voltage
50 V
Cutoff voltage range
+35 to +50 V
Grid1 circuit resistance maximum
1.5 Mohm
Anode voltage minimum
15000 V
Heater voltage minimum
5.8 V
Heater voltage maximum
7 V
Focus-electrode voltage minimum
-550 V
Focus-electrode voltage maximum
1100 V
Grid2 voltage maximum
70 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
LOW-VOLTAGE ELECTROSTATIC FOCUS
10 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 pF
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
25 V
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.
Anode Voltage
16000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.4 Voltage — 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 — published value 2
500 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.2 Voltage
50 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
focused raster — published value 1
35 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
focused raster — published value 2
50 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Other
ANODE VOLTAGE
22000 V
Published CRT datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Combined AC and DC voltage
200 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.