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
Typical grid 2 voltage
200 V
Typical operating conditions
Diagonal deflection angle
90 deg
Cathode to all other electrodes
4 pF
Approximate
Data set 02
Published operating points and test conditions from this source.
FACEPLATE LIGHT TRANSMISSION
5 percent
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
HEATER VOLTAGE
3 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
HEATER POSITIVE WITH RESPECT 70 CATHODE
70 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
DC GRID #4 VOLTAGE D — 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 D — value 2
55 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
DC GRID #4 VOLTAGE D — value 3
3 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 E — 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 E — value 2
-2 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
DC GRID #1 VOLTAGE E — value 3
-72 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
D WITX ANODE CURRENT OF 100 µAMP•
100
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
I N.AGYUCH AS THE TUBE RATING PERMITS OPERATION AT VOLTAGES AS HI GM AS 19•R NI LOVOL TS (A850L UTE
19 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
Pl AT[
16 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 #i CIRCUIT RESISTANCE
1 mA
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.