Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Gauge Tube ·Gauge

7903

Three-electrode high-pressure ionization vacuum gauge designed for gas-pressure measurement over a comparatively wide range.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
1.3 V / 2.4 A

Description

High-pressure three-electrode ionization vacuum gauge for measuring gas pressure over a wide range.

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
1.3 V
Nominal heater current
2.4 A
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

Gauge

X-ray radiationInterelectrode capacitances
Max plate voltage
400 V

Published electrical limits and characteristics promoted from the approved source; non-schema quantities are retained in TUBE_SECTION_PARAMETER.

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

1947 Westinghouse

Published operating points and test conditions from this source.

SECTION 1

Gauge

Other

  • HeaterVoltageNominal

    1.3 V

    Nominal

  • HeaterCurrentNominal

    2.4 A

    Nominal

  • MaximumPlateOrOperatingVoltage

    400 V

  • IonCollectorVoltageMaximum

    400 V

    Outgassing

  • OperatingIonCollectorVoltageMaximumMagnitude

    55 V

  • GasPressureMaximum

    0.001 mmHg

    Power applied