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
700 V
Specialized - Cathode Ray ·CathodeRay
23XP4
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 23XP4.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- 12L
- Socket code
- NEOEIGHTAR7
- Base pins
- -
- Nominal heater
- 6.3 V / 600 mA
Description
Twenty-three-inch rectangular bonded-shield television CRT with electrostatic focus, magnetic deflection, and aluminized P4 screen.
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
- 12L
- Socket code
- NEOEIGHTAR7
- Base pins
- -
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 600 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
12L - 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
- 700 V
High-voltage CRT ratings promoted from source. Sylvania source includes X-ray radiation precautions/warning.
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 Anode voltage
22000 V
Maximum Anode voltage ...... 22,000 25,000 18,000 22,000 Volts
Grid No. 2 Voltage
550 V
Grid No. 2 Voltage ........ 700 550 Volts
Anode voltage
16000 V
Anode voltage .......... 16,000 16,000 Volts
Grid No. 4 Voltage for Focus
400 V
Grid No. 4 Voltage for Focus .... 0 to 400 0 to +400 Volts
Grid No. 2 Voltage
300 V
Grid No. 2 Voltage ........ 500 300 Volts
CircuitValue
Grid No. 1 Circuit Resistance
1.5 Mohm
Grid No. 1 Circuit Resistance .... 1.5 Megohms Max.