Variable Attenuator

8400-1L1N

8400-1L1N
(NSN) National Stock Number
5985-00-120-8718
Federal Supply Classification
5985 Antennas, Waveguides and Related Equipment
Item Name Code
00838
Schedule B Code
8529109000
Summary

Transmission line application design, coaxial type body style, 5.410 inches minimum and 5.490 inches maximum overall length, 3.540 inches nominal center to center distance between mounting facilities parallel to length, 2.230 inches nominal center to center distance between mounting facilities parallel to width, 2.990 inches nominal overall height

DAC HCC DMIL RNCC
5 - - 5
RNVC SADC MSDS RNAAC
9 - - TX
Identification

A device for reducing the strength of an alternating current signal either continuously or in steps, without causing appreciable signal distortion, by maintaining substantially constant output and/or input impedance match. Continuously variable resistive devices must consist of at least two sections or one section with at least two rotating contacts. The item must have an overall attenuation rating. Includes tandem mounted variable resistors designed to function as an attenuator but whose terminals are not connected. See also resistor, vaiable (as modified).

INC FIIG Concept Condition
00838 A223A0 - 1
Specifications
Application Design
transmission line
Details The primary application for which the item is designed.
Body Style
coaxial type
Details The style designation indicating the configuration that most nearly corresponds to the appearance of the body.
Overall Length
5.410 inches minimum and 5.490 inches maximum
Details The dimension measured along the longitudinal axis with terminated points at the extreme ends of the item.
Center To Center Distance Between Mounting Facilities Parallel To Length
3.540 inches nominal
Details The distance between the center of one mounting facility and the center of the adjacent mounting facility parallel to the length.
Center To Center Distance Between Mounting Facilities Parallel To Width
2.230 inches nominal
Details The distance between the center of one mounting facility and the center of the adjacent mounting facility parallel to the width.
Overall Height
2.990 inches nominal
Details The distance measured in a straight line from the bottom to the top of an item.
Overall Width
1.265 inches minimum and 1.285 inches maximum
Details An overall measurement taken at right angles to the length of an item,in distinction from thickness.
Unthreaded Mounting Hole Diameter
0.156 inches nominal
Details The length of a straight line which passes through the center of an unthreaded mounting hole,and terminates at the circumference.
Voltage Standing Wave Ratio
1.50
Details The ratio of the maximum to the minimum amplitude of pressure /voltage/ measured along the path of the waves.
Coaxial Connector Series Designation
n
Details A letter or group of letters used to designate the particular coaxial connector series.
Overall Attenuation Range In Decibels
+0.7 to 40.0
Details The overall limits of decrease of the amplitude ratio of a signal between the input and output of the item,expressed in decibels.
Attenuation Variation Method
continuous
Details The means by which the attenuation can be varied from the minimum to the maximum setting.
Mounting Facility Type And Quantity
4 unthreaded hole
Details Indicates the type and number of facilities by which the item is mounted.
Frequency Range
2.700 gigahertz minimum and 2.900 gigahertz maximum
Details The minimum and maximum cyclic changes,per unit of time,for which an item is rated.
Body Material
aluminum alloy
Details The chemical compound or mechanical mixture properties of which the body is fabricated.
Adjustment Device Type And Quantity
1 electronic, voltage controlled
Details Indicates the type and number of facilities for adjusting the item.
Mounting Facility Pattern
four position rectangular
Details The general configuration and relative position of the facilities provided for mounting the item.
Impedance Rating In Ohms
50.0 output
Details The total opposition (resistive and reactive) to the flow of alternating current,expressed in ohms.
Special Features
voltage to attenuation characteristics shall be linear from 0.7 db to a m in of 40.0 db; exterior finish shall be brown to match fed std 595 color number 30372
Details Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification on one or more other functions.
Terminal Type And Quantity
1 connector, coaxial, female and 1 connector, coaxial, male and 1 connector, receptacle
Details Indicates the type and number of terminals for providing electrical connection.
Fsc Application Data
antennas,waveguides,and related equipment
Details The justification for the assignment of a federal supply class /fsc/ to an item based on the classification of the next higher classifiable assembly.
Master-Cross Reference List
Part CAGE DAC HCC RNCC RNVC MSDS RNAAC
AM7009 17540 5 - 5 2 - TX
8400-ILIN 96341 5 - 5 9 - TX
421407 80006 5 - 5 9 - TX
669525-1 96214 A - 3 2 - TX
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
HMIC PMIC ESD/EMI Criticality
P A - -
Freight
Universal / National Freight and Handling Information
UFC HMC LTL LCL
34580 - W -
RVC WCC TCC SHC
- 658 Z 9

What's Included?

  • Certificate of Conformity
  • QC Inspection prior to shipping
  • On time delivery
  • Friendly service to back every order
Manufacturer
COBHAM ADVANCED ELECTRONIC SOLUTIONS INC.
CAGE: 96341
LOWELL , MA , 01854-1040
UNITED STATES
View Products
FAQs
Frequently asked questions for NSN 5985-00-120-8718
What is the NIIN of the NSN 5985-00-120-8718?
The National Item Identification Number (NIIN) of the NSN 5985-00-120-8718 is 00-120-8718
When the NSN 5985-00-120-8718 was assigned to the Federal Catalog?
It was assigned 52 years ago, on Fri, Dec 29, 1972
Does the NSN 5985-00-120-8718 contain any precious metals?
Does not contain precious metal
Does the NSN 5985-00-120-8718 contain any hazardous material?
No information in HMIRS

Can't Find It

If you didn't find what you need, don't worry, we're here to help! Our team is ready to help you find exactly what you need. Click below to contact us.

Similar Products
Who we are?

At Aerospace Shop, we are dedicated to providing high-quality aerospace components, shop supplies, replacement parts, and tools.

With a commitment to excellence and customer satisfaction, we aim to be your trusted partner in the aerospace industry.

Contact
800 Town and Country Blvd
Houston, TX, 77024
United States
© 2025 Aerospace Shop, Inc. All rights reserved.
Made in USA