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Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Cathode Ray ·CathodeRay

27MP4

Twenty-seven-inch direct-view monochrome television picture tube with magnetic deflection and high-voltage operation. Manufacturer documentation provides focusing, optical, and electrical characteristics for large-screen receiver display service.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
DUODECAL5
Base pins
12
Nominal heater
6.3 V / 600 mA

Description

Direct-view cathode-ray picture tube intended for television display service. The supplied Tung-Sol datasheet provides electrical ratings, operating conditions, capacitances, optical characteristics, focusing and deflection information. Features an aluminized screen where specified by this designation.

Socket description

Small-shell Duodecal 5-contact CRT base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
DUODECAL5
Base pins
12
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Cathode Ray

X-ray radiationInterelectrode capacitances
Max plate voltage
18000 V

Direct-view television CRT; high-voltage electrode rating mapped to MaxPlateVoltage as the section high-voltage limit.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Capacitance

  • Heater Cathode Capacitance

    5 pF

    Approximate

Other

  • HighVoltageElectrodeMaximum

    18000 V

    CRT

Data set 02

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • RECTANGULAR METAL CONSTRUCTION

    10

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DIRECT INTERELECTR ODE CAPACITANCES (APPROX.) — value 1

    1

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DIRECT INTERELECTR ODE CAPACITANCES (APPROX.) — value 2

    0

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • GRID #1 TO ALL OTHER ELECTRODES — value 1

    1

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • GRID #1 TO ALL OTHER ELECTRODES — value 2

    0

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • GRID #1 TO ALL OTHER ELECTRODES — value 3

    6

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • PHOSPHOR NUMBER

    4

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • FACEPLATE LIGHT TRANSMISSION AT CENTER (APPROX.) — value 1

    11 percent

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • FACEPLATE LIGHT TRANSMISSION AT CENTER (APPROX.) — value 2

    66 percent

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • HEATER

    7.3 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • HEATER

    0 mA

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • HEATER POSITIVE WITH RESPECT TO CATHODE

    1 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • BBEC AU SE THE RATING OF THIS TUBE PERMITS ANODE VOLTAGES AS NI GX AS 19.8 KV, SMIEL DI NG OF %-RAv — value 1

    0 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • BBEC AU SE THE RATING OF THIS TUBE PERMITS ANODE VOLTAGES AS NI GX AS 19.8 KV, SMIEL DI NG OF %-RAv — value 2

    19.8 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • BBEC AU SE THE RATING OF THIS TUBE PERMITS ANODE VOLTAGES AS NI GX AS 19.8 KV, SMIEL DI NG OF %-RAv — value 3

    0 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • R AOI ATION FROM TXE TUBE NAY BE NECESSARY. THIS PR ELAU TI ON SHOULD RE OB SER YEO wXEN THE ANODE — value 1

    0

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • R AOI ATION FROM TXE TUBE NAY BE NECESSARY. THIS PR ELAU TI ON SHOULD RE OB SER YEO wXEN THE ANODE — value 2

    0

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DC COLLECTOR IGRID #5 VOLTAGE — value 1

    1 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DC COLLECTOR IGRID #5 VOLTAGE — value 2

    5 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DC COLLECTOR IGRID #5 VOLTAGE — value 3

    16000 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DC GRID #2 VOLTAGE — value 1

    2 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DC GRID #2 VOLTAGE — value 2

    300 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DC GRID #1 VOLTA GE C — value 1

    1 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DC GRID #1 VOLTA GE C — value 2

    3 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DC GRID #1 VOLTA GE C — value 3

    3 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • DC FOCUSING COIL CURRENT (APPROX.)D

    11 mA

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • ION TRAP MAGNET (RATED STRENGTH) — value 1

    10

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • ION TRAP MAGNET (RATED STRENGTH) — value 2

    506

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • L VI SU AI EXiINCTI OX OF FOCUSED RASTER. — value 1

    1

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • L VI SU AI EXiINCTI OX OF FOCUSED RASTER. — value 2

    0

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • L VI SU AI EXiINCTI OX OF FOCUSED RASTER. — value 3

    0

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • D FOR ST AMDARD FOCUS COIL f109, OR EOUIVAI ENT, WI TX THE COMBINED GRID fl BIAS VOLTAGE AMO VIDEO — value 1

    9 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • D FOR ST AMDARD FOCUS COIL f109, OR EOUIVAI ENT, WI TX THE COMBINED GRID fl BIAS VOLTAGE AMO VIDEO — value 2

    0 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • SIGMAL VOLTAGE AO JU STED TO PRODUCE A MI GXLI GNT BR IGN THE 55 OF j0 F00T LAMBERTS ON A 2j 1/16" BY — value 1

    2 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • SIGMAL VOLTAGE AO JU STED TO PRODUCE A MI GXLI GNT BR IGN THE 55 OF j0 F00T LAMBERTS ON A 2j 1/16" BY — value 2

    1 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • SIGMAL VOLTAGE AO JU STED TO PRODUCE A MI GXLI GNT BR IGN THE 55 OF j0 F00T LAMBERTS ON A 2j 1/16" BY — value 3

    16 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • 18 1/B" PICTURE SIZE. DISTANCE FROM REFER EMCE LIME TO CENTER OF AIR GAP ON FOCUS COIL SN ALL BE — value 1

    11

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • 18 1/B" PICTURE SIZE. DISTANCE FROM REFER EMCE LIME TO CENTER OF AIR GAP ON FOCUS COIL SN ALL BE — value 2

    0

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • 18 1/B" PICTURE SIZE. DISTANCE FROM REFER EMCE LIME TO CENTER OF AIR GAP ON FOCUS COIL SN ALL BE — value 3

    0

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

Other

  • MAXIMUM DC GRID #3, COLLECTOR VOLTAGE AB — value 1

    3 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM DC GRID #3, COLLECTOR VOLTAGE AB — value 2

    1 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM DC GRID #3, COLLECTOR VOLTAGE AB — value 3

    0 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM OC GRIO #2 VOLTAGE — value 1

    0 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM OC GRIO #2 VOLTAGE — value 2

    2 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM OC GRIO #2 VOLTAGE — value 3

    500 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM GRID #i VOLTAGE

    1 V

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM GRID #1 CIRCUIT RESISTANCE — value 1

    1

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM GRID #1 CIRCUIT RESISTANCE — value 2

    5

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.

  • MAXIMUM GRID #1 CIRCUIT RESISTANCE — value 3

    0

    Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.