Specialized - Cathode Ray ·CathodeRay
Twenty-inch direct-view television picture tube with P4 white phosphor and published electrical, optical, capacitance, and operating data. Tung-Sol documentation identifies a conventional high-voltage monochrome receiver display.
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.
Small-shell Duodecal 5-contact CRT base
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
No fixed ratings are recorded for this section.
CRT ratings, operating conditions, capacitances, and optical/deflection data retained below 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
Anode voltage
20 V
Published CRT data
Grid 2 voltage
250 V
Published CRT data
Data set 02
Published operating points and test conditions from this source.
DEFLECTION
54 degrees
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
HEATER
6.3 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
MAX FMUM OC ANODE
2 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
HEATER POSITIVE WITH RESPECT TO CATHODE
14 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.
OC FOCUSING COIL CURRENT (APPROX.) B
135 mA
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
VIDEO SIGNAL VOLTAGE ADJUSTED TO PRODUCE A HIGHIIGMT BRIGNTNE55 OF 25 FOOT LAMBERTS ON A
25 V
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
12 j/4" % 11" PICTURE SIZE. DISTANCE FROM REFERENCE LINE TO CENTER OF AIR GAP ON FOCUS — value 1
12
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
12 j/4" % 11" PICTURE SIZE. DISTANCE FROM REFERENCE LINE TO CENTER OF AIR GAP ON FOCUS — value 2
4
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.
12 j/4" % 11" PICTURE SIZE. DISTANCE FROM REFERENCE LINE TO CENTER OF AIR GAP ON FOCUS — value 3
11
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
1.5 mA
Published CRT datasheet value; multiple values on a row correspond to separate source-table conditions or limits.