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Tube Tinker — Electron Tube Database
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Specialized - Cathode Ray ·CathodeRay

MW3174

Thirty-one-centimeter television picture tube with magnetic focusing and magnetic deflection, designed for direct-view monochrome receiver service.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B12A
Base pins
-
Nominal heater
6.3 V / 300 mA

Description

31 cm television picture tube with magnetic focusing and magnetic deflection.

Socket description

Duodecal 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B12A
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
300 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
11000 V

31 cm television picture tube with ion trap, filter glass, magnetic focusing, and magnetic deflection.

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

1957 Philips Receiving and Amplifying Tubes

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    300 mA

  • DeflectionMethod

    Magnetic

  • FocusingMethod

    Magnetic

Other

  • TypicalAcceleratingVoltage

    7000 V

  • MaximumAcceleratingVoltage

    11000 V

Data set 02

1963 Philips Electron Tubes Handbook V2

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Capacitance

  • Grid-1 capacitance

    8 pF

  • Cathode capacitance

    5 pF

  • Grid-3 to outer-coating capacitance

    1200 pF

Other

  • Screen color

    White

  • Color temperature

    7500 K

  • Light transmission

    70 %

  • Useful diameter

    287 to - mm

    Minimum

  • Deflection angle

    - to 63 deg

  • Grid-3 voltage

    7000 V

    OperatingPoint1

  • Grid-3 voltage

    9000 V

    OperatingPoint2

  • Grid-2 voltage

    250 V

  • Maximum grid-3 voltage

    11000 V

  • Minimum grid-3 voltage

    6000 V

  • Maximum grid-2 voltage

    410 V

  • Maximum grid-1 bias magnitude

    200 V

Characteristic

  • Grid-1 cutoff-voltage magnitude

    32 to 71 V

  • Focusing ampere-turns at 7 kV

    605 to 745 A-turns

  • Focusing ampere-turns at 9 kV

    665 to 815 A-turns

Data set 03

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Heater voltage

    6.3 V

  • Heater current

    300 mA

  • Grid No.1 cutoff voltage

    -20 to -60 V

Construction

  • Useful screen diameter

    265 mm

  • Deflection method

    Magnetic

  • Focusing method

    Magnetic

  • Screen construction

    Metal-backed

  • Ion trap

    Present

  • Filter glass

    Present

Other

  • Operating anode voltage

    7000 V

  • Maximum anode voltage

    11000 V

  • Grid No.2 / auxiliary anode voltage

    250 V

  • Electrical data reference

    MW3116

    IdenticalExceptFilterGlass