FW113

Two-stage cascaded image converter/intensifier with an S-11 photocathode and magnetic focusing. Its cascaded stages provide increased image brightness for low-light viewing or recording.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 2
Base: -
Socket code: -
Base pins: -
Nominal heater: -

Description

ITT Laboratories FW-113 is a two-stage cascaded image converter/intensifier with an S-11 photocathode and magnetic focusing.

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

2 physical sections, with 1 unique section. The remaining sections have identical specifications.

Section 1

ImageConverterIntensifier

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Two diode-type image-converter stages in one envelope; optical/electron-image performance 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

1962 ITT

Published operating points and test conditions from this source.

SECTION 1

ImageConverterIntensifier

Characteristic

Number of image-converter stages
2
Photocathode response
S-11
Output phosphor
P20
Useful cathode diameter
1.5 in
Useful phosphor diameter
1.5 in

Other

Focusing magnetic flux density
475 gauss
Image magnification minimum
0.9 x
Image magnification maximum
1 x
Paraxial resolution
15 lp/mm
Overall luminous sensitivity
1000 uA/lm
Brightness gain with P20
400 x
Nominal stage voltage
12 kV