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

A61120WR

Large direct-view monochrome television picture tube with magnetic deflection and electrostatic focusing. Its rectangular aluminized screen and wide-angle scanning are designed for conventional television receiver display service.

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

Description

61 cm reinforced direct-view television CRT with ring-trap base and 110-degree deflection.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
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
20000 V

Published Mullard ratings, characteristics, capacitances, and operating data promoted where applicable; additional electrical values retained as parameters.

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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Focusing method

    Electrostatic

  • Deflection method

    Magnetic

  • Deflection angle

    110 deg

  • Light transmission

    42 %

Construction

  • Screen construction

    Metal-backed

Application

  • Application

    Direct-view television / radar display

Other

  • Final-anode voltage maximum

    20 kV

  • Final-anode voltage operating

    16 kV

  • Focus-electrode positive voltage maximum

    1000 V

  • Focus-electrode negative voltage maximum

    -500 V

  • Heater surge voltage maximum

    9.5 V rms

    SeriesHeater

  • Grid positive excursion maximum

    2 V