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
23000 V
Grid2 Voltage
550 V
Specialized - Cathode Ray ·CathodeRay
23UP4
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 23UP4.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- 8HR
- Socket code
- NEOEIGHTAR7
- Base pins
- -
- Nominal heater
- 6.3 V / 450 mA
Description
Twenty-three-inch rectangular television picture tube with 110-degree magnetic deflection, electrostatic focus, bonded shield, 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
- 8HR
- Socket code
- NEOEIGHTAR7
- Base pins
- -
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 450 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
8HR - 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
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 Grid No. 2 voltage
200 V
Published maximum Grid No. 2 voltage
Maximum Anode voltage
18000 V
Maximum Anode voltage ..... 23,000 18,000 Volts
Minimum Anode voltage
10000 V
Minimum Anode voltage ..... 12,000 10,000 Volts
Grid No. 4 Voltage ( Focusing Electrode) . -550to+
1100 V
Grid No. 4 Voltage ( Focusing Electrode) . -550to+1100 Volts ELECTRONIC TUBES
MaximumGridNo.2Voltage
550 V
MaximumGridNo.2Voltage . . . 550 Volts A Division of
Minimum Grid No. 2 Voltage
200 V
Minimum Grid No. 2 Voltage .... 200 Volts Sylvania Electric Products lnc.
Warm-up Period Not to Exceed
15 s
Warm-up Period Not to Exceed 15 Seconds 450 Volts PAGE I OF 3
After Equipment warm-up period
200 V
After Equipment warm-up period. . . 200 Volts Pile Undo,
Heater positive with Respect tocathode
200 V
Heater positive with Respect tocathode. . . 200 Volts TELEVISION PICTURE TUBES
Grid No. 4 Voltage ( Focusing Electrode) . . 400`to+
1250 V
Grid No. 4 Voltage ( Focusing Electrode) . . 400`to+1250 Volts
Grid No. 2 Voltage
700 V
Grid No. 2 Voltage ....... 700 Volts
Heater Positive with Respect to Cathode
200 V
Heater Positive with Respect to Cathode 200 Volts
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
400 V
Grid No. 2 Voltage ....... 400 Volts
Grid No. 1 Voltage Required for Cutoff5 46 to
-94 V
Grid No. 1 Voltage Required for Cutoff5 46 to -94 Volts
Cathode voltage Required for cutoff 5
78 V
Cathode voltage Required for cutoff 5 ................-. 42 to 78 Volts
Characteristic
Light Transmittance of Faceplate Assembly (Approx.)
40 %
Light Transmittance of Faceplate Assembly (Approx.) . . 40 Percent External Conductive Coating
Type 23CBP4 has external surface of safety plate treated to reduce
6.3 V
Type 23CBP4 has external surface of safety plate treated to reduce 6.3 Volts, 450 Ma Heater
CircuitValue
Grid No. 1 Circuit Resistance
1.5 Mohm
Grid No. 1 Circuit Resistance . 1.5 Megohms Max.