Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Gauge
Characteristic
HeaterOrFilamentVoltage
3.1 V
HeaterOrFilamentCurrent
3.5 A
Other
Grid Voltage
150 V
CollectorVoltage
-25 V
Specialized - Gauge Tube ·Gauge
VG1A
Hot-filament ionization gauge tube designed for high-vacuum pressure measurement down to approximately 10^-7 to 10^-8 mm Hg.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 3.1 V / 3.5 A
Description
Hot-filament ionization gauge tube for vacuum-pressure measurement down to about 10^-7 mm Hg.
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
- 3.1 V
- Nominal heater current
- 3.5 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
No fixed ratings are recorded for this section.
Ratings and characteristics promoted from the supplied Sylvania source where explicitly published.
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 02
1965 Sylvania Electronic Tubes Vol3
Published operating points and test conditions from this source.
SECTION 1
Gauge
Other
Filament voltage
3 to 7.5 V
Filament current
3.5 A to 5 A
Grid voltage
150 V
Grid current
5 mA
Collector voltage
-25 V
Grid degassing current
7 A
Degassing
Characteristic
Sensitivity for air
90 to 125 uA/micron Hg
Typical sensitivity below one micron
100 uA/micron Hg
Nominal lower pressure capability
1e-7 mm Hg