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

6981

Bayard-Alpert ionization vacuum gauge with thoriated iridium-rhodium emitter.

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

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
-
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 0

Gauge

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Bayard-Alpert ionization gauge, directly heated oxidation-resistant cathode.

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

9999 Mixed G 2000

Published operating points and test conditions from this source.

SECTION 0

Gauge

Other

  • Heater/filament voltage

    3 V

    Filament operating minimum voltage

  • Heater/filament voltage

    6 V

    Filament operating maximum voltage

  • Heater/filament current

    3 A

    Filament operating minimum current

  • Heater/filament current

    6 A

    Filament operating maximum current