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
Specialized - Cathode Ray ·CathodeRay
23TP4
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 23TP4.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- B12A
- Base pins
- -
- Nominal heater
- 6.3 V / 600 mA
Description
Twenty-three-inch rectangular television picture tube with electrostatic focus, magnetic deflection, bonded safety shield, aluminized P4 screen, and no ion trap.
Socket description
Duodecal 12-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B12A
- Base pins
- -
- 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
- 22000 V
- Max screen voltage
- 550 V
Direct-view CRT; maximum anode voltage promoted. Source warns of possible X-radiation exposure above specified voltage conditions.
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
Other
Maximum Grid No. 2 voltage
550 V
Published maximum Grid No. 2 voltage
Maximum Anode voltage
18000 V
Maximum Anode voltage ............ 22,000 18,000 Volts
Minimum Anode voltage
8000 V
Minimum Anode voltage ............ 12,000 8,000 Volts
Grid No. 4 Voltage (Focusing Electrode)
1100 V
Grid No. 4 Voltage (Focusing Electrode) ....... ...- 550to+1100Volts
Grid No. 2 Voltage
550 V
Grid No. 2 Voltage .............. 550 Volts
During Warm-up Period not to Exceed
15 s
During Warm-up Period not to Exceed 15 Seconds
Anode voltage
16000 V
Anode voltage ......... 16,000 Volts
Grid No. 4 Voltage for Focus
400 V
Grid No. 4 Voltage for Focus .... 0 to +400 Volts
Grid No. 2 Voltage
300 V
Grid No. 2 Voltage ....... 300 Volts
Grid No. 1 Voltage Required for Cutoff3 -35 to
-72 V
Grid No. 1 Voltage Required for Cutoff3 -35 to-72 Volts
Characteristic
Heater voltage
6.3 V
Heater voltage ......... 6.3 Volts
Heater warm-up Timel
11 s
Heater warm-up Timel ...... 11 Seconds
CircuitValue
Grid No. 1 Circuit Resistance
1.5 Mohm
Grid No. 1 Circuit Resistance .... 1.5 Megohms Max.