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 21CDP4A.
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
450 mA
Nominal
Maximum anode voltage
29000 V
Maximum grid 2 voltage
550 V
Typical anode voltage
29000 V
Typical operating conditions
Typical grid 2 voltage
550 V
Typical operating conditions
Heater warm-up time
11 s
Diagonal deflection angle
90 deg
Data set 02
Published operating points and test conditions from this source.
GRID #1 TO ALL OTHER E~LECTR ODES — 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 E~LECTR ODES — value 2
0
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MINIMUM EXTERNAL CONDUCTIVE COATING TO ANODE
2
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
HEATER VOLTAGE
6.3 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
HEATER POSITIVE WITH RE SfECT TO CATHODE
2 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
HEATER — value 1
11
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
HEATER — value 2
0
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
FIN 2 — ,RID •i
2
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MAXIMUM EXTERNAL CONDUCTIVE COATING TO ANODE
2500 mA
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MAXIMUM DC ANODE VOLTAGE
22 V
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
550 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
1100 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
55 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 #i CIRCUIT RESISTANCE
1.5 mA
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.