Specialized - Cathode Ray ·CathodeRay
Large P4 monochrome television picture tube documented for high-voltage direct-view service, using magnetic deflection and manufacturer-specified focusing and beam-control arrangements for type 21BCP4.
Direct-view cathode-ray picture tube for television display service. Electrical ratings, operating conditions, capacitances, optical data, and construction details were extracted from the supplied datasheet.
Duodecar 12-contact
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Published CRT ratings, operating conditions, capacitances, optical and deflection data are retained in parameter rows.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Nominal
Heater current
600 mA
Nominal
Maximum anode voltage
20000 V
Maximum grid 2 voltage
500 V
Typical anode voltage
20000 V
Typical operating conditions
Typical grid 2 voltage
500 V
Typical operating conditions
Diagonal deflection angle
70 deg
Cathode to all other electrodes
775 pF
Approximate
Data set 02
Published operating points and test conditions from this source.
GRID #1 TO ALL OTHER ELECTRODES — value 1
1
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
GRID #1 TO ALL OTHER ELECTRODES — value 2
6
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MINIMUM EXTERNAL CONDUCTIVE COATING TO ANODE
500
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
HEATER CURRENT
1
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
DC ANODE VOLTAGE H
16 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
DC GRID #4 VOLTAGE — value 1
4 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
DC GRID #4 VOLTAGE — value 2
5 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
DC GRID #4 VOLTAGE — value 3
550 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
DC GRID #2 VOLTAGE — value 1
2 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
DC GRID #2 VOLTAGE — value 2
3 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
DC GRID #1 VOLTAGE A — value 1
1 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
DC GRID #1 VOLTAGE A — value 2
-7 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
DC GRID #4 CURRENT
4
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
VOLTAGE SHOULD NOT BE IE SS Tx AN 14,000 VOLTS. — value 1
14 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
VOLTAGE SHOULD NOT BE IE SS Tx AN 14,000 VOLTS. — value 2
0 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
~^IN 6 — value 1
6
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
~^IN 6 — value 2
4
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
~^IN 6 — value 3
3
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MAXIMUM EXTERNAL CONDUCTIVE COATING TO ANODE
750 mA
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MAXIMUM DC GRID #4 VOLTAGE — value 1
4 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MAXIMUM DC GRID #4 VOLTAGE — value 2
-5 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MAXIMUM DC GRID #4 VOLTAGE — value 3
1000 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MAXIMUM DC GRID #2 VOLTAGE — value 1
2 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MAXIMUM DC GRID #2 VOLTAGE — value 2
5 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MAXIMUM GRID #1 VOLTAGE
1 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MAXIMUM GRID #1 CIRCUIT RESISTANCE — value 1
1 mA
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MAXIMUM GRID #1 CIRCUIT RESISTANCE — value 2
1 mA
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MAXIMUM GRID #1 CIRCUIT RESISTANCE — value 3
5 mA
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
Data set 03
Published operating points and test conditions from this source.
Typical Anode Voltage
16000 V
Typical Grid No. 2 Voltage
300 V
Grid No. 1 Maximum Negative Bias
125 V
Grid No. 1 Maximum Positive Peak
2 V