Data set 01
1947 Westinghouse
Published operating points and test conditions from this source.
SECTION 1
ImageConverterIntensifier
Characteristic
BrightnessGainMinimum
1000 ratio
2870K tungsten input
Other
AnodeScreenVoltage
30 kV
Specialized - Photo Tube ·ImageConverterIntensifier
7257
High-vacuum image intensifier providing substantial electronic brightness gain for low-light visual imaging.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 0 V / 0 mA
Description
High-vacuum light image intensifier providing strong electronic brightness gain.
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
- 0 V
- Nominal heater current
- 0 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
ImageConverterIntensifier
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 30000 V
Light image-intensifier electron-optical section.
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.