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Tube Tinker — Electron Tube Database
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Specialized - Sensor Tube ·Sensor

6MX4S

Russian dual movable-anode mechanotron for precision linear displacement and force measurement. It provides especially high current sensitivity to very small mechanical movement.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
IO
Base pins
-
Nominal heater
6.3 V / 410 mA

Description

Mechanotron with two movable anodes for precision measurement of linear displacement and force. Extracted and translated from the complete Russian entry corresponding to the PDF filename; neighboring page-break fragments were excluded.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
IO
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
410 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

Sensor

X-ray radiationInterelectrode capacitances
Plate resistance
2000 Ω
Max plate voltage
20 V
Max cathode current
13 mA

Values promoted from the complete filename-matched Russian entry only.

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

1981 Russian Tubes Katsnelson and Larionov

Published operating points and test conditions from this source.

SECTION 1

Sensor

Characteristic

  • Heater current

    410 mA

    Translated from Russian source; filename-matched entry only

  • Internal resistance

    2 kOhm

    Translated from Russian source; filename-matched entry only

  • Current sensitivity to displacement

    210 uA/um

    Translated from Russian source; filename-matched entry only

  • Temperature sensitivity maximum

    0.2 um/C

    Translated from Russian source; filename-matched entry only

  • Output drift maximum

    0.2 um/h

    Translated from Russian source; filename-matched entry only

  • Service life minimum

    1000 h

    Translated from Russian source; filename-matched entry only

  • Maximum plate voltage

    20 V

    Translated from Russian source; filename-matched entry only