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Specialized - Gauge Tube ·Gauge

6578

Ionization vacuum gauge with three separately connected filaments and provision for grid outgassing.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
7EH
Socket code
-
Base pins
7
Nominal heater
5 V / 6 A

Description

Ionization vacuum gauge with three separately connected filaments and grid-outgassing provision.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7EH
Socket code
-
Base pins
7
Nominal heater voltage
5 V
Nominal heater current
6 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7EH - 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

No fixed ratings are recorded for this section.

Published applicable promoted ratings populated; remaining device-specific 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

1955 Vacuum Tube Products

Published operating points and test conditions from this source.

SECTION 1

Gauge

Characteristic

  • Filament Count

    3 count

  • Dry Air Sensitivity

    80 uA/micron

    At typical grid current

Other

  • Filament Voltage Maximum

    5 V

    Single filament

  • Filament Current Maximum

    6 A

    Single filament

  • Grid Voltage Maximum

    500 V

    Referenced to filament

  • Grid Emission Current Maximum

    15 mA

  • Collector Voltage Maximum

    500 V

    Referenced to filament

  • Corrosive Gas or Nitrogen Pressure Maximum

    5 micron

    Filament hot

  • Noble Gas or Hydrogen Pressure Maximum

    1.2 atm

    Filament hot

  • Typical Filament Voltage

    3 V

    Single filament

  • Typical Filament Current

    4 A

    Single filament

  • Typical Grid Voltage

    150 V

  • Typical Grid Current

    5 mA

  • Typical Collector Voltage

    -30 V