Specialized - Cathode Ray ·CathodeRay
Twenty-one-inch direct-view monochrome television picture tube designed for large-screen receiver service. Manufacturer data documents its magnetic scanning system, high-voltage operation, and picture-tube optical and electrical characteristics.
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
CRT ratings, operating conditions, capacitances, optical and deflection data retained as parameters.
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 grid 2 voltage
500 V
Typical grid 2 voltage
500 V
Typical operating conditions
Horizontal deflection angle
85 deg
Vertical deflection angle
68 deg
Diagonal deflection angle
30 deg
Cathode to all other electrodes
7 pF
Approximate
Data set 02
Published operating points and test conditions from this source.
HEATER VOLTAGE
6 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
HEATER POSITIVE WITH RESPECT TO CATHODE
1 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
DC GRID #2 VOLTAGE
2 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
DC FOCUSING COIL CURRENT (APPROX.)E
117 mA
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
VOLTAGE SX OVLD p0T BE LESS 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 SX OVLD p0T BE LESS 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.
18 15/16" PICTURE SIZE. OI STANCE FR ON REFERENCE LINE TO CENTER OF AIR GAP OM FOCUS COIL SMALL — value 1
18 mA
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
18 15/16" PICTURE SIZE. OI STANCE FR ON REFERENCE LINE TO CENTER OF AIR GAP OM FOCUS COIL SMALL — value 2
15 mA
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
18 15/16" PICTURE SIZE. OI STANCE FR ON REFERENCE LINE TO CENTER OF AIR GAP OM FOCUS COIL SMALL — value 3
16 mA
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MAXIMUM DC ANODE I GRID #3 VOLTAGE
3 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MAXIMUM DC GRID #2 VOLTAGE
2 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.
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