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Specialized - Cathode Ray ·CathodeRay

A40G3

Mullard oscillographic cathode-ray tube with a green normal-persistence screen. Its compact display format is intended for oscilloscope and measurement applications rather than television picture service.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
4 V / -

Description

The Mullard A40G3 is a 3-inch oscillographic CRT with green normal-persistence screen

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
4 V
Nominal heater current
-
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

No fixed ratings are recorded for this section.

Cathode-ray electron-gun/display section.

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

  • Heater Voltage

    4 V

  • Heater Current

    -

  • Focusing Method

    Electrostatic text

  • Deflection Method

    Double electrostatic text

  • Fluorescence

    Green text

  • Persistence

    Normal text

  • Maximum Writing Speed

    0.3 km/s

  • Grid Capacitance

    6 pF

Other

  • Anode 2 Voltage

    500 V

  • Focus Voltage

    140 V

    Approximate

  • Anode 2 Voltage Maximum

    800 V