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The versatile NMO antenna mount

A popular type of antenna mount is called an “NMO” which stand for new Motorola.  NMO mounts come in a variety of types and are frequently used especially when installing mobile antennas.  Whether you are installing an antenna on a vehicle or a fixed structure the NMO mount may be a good solution.

The idea of the NMO mount is simple.  NMO mounts are devised to have a standard threaded connector where you screw on the antenna of choice to the mount of choice.  The NMO mount itself connects to the antenna and provides the antenna cable as well.  There are a large number of antennas that are built to screw on to the NMO mount. Simply look for an antenna with an NMO base.  Here is a simple picture of a mobile antenna with an NMO base combining to an NMO mount:

 

nmo-antenna-combines-to-mount

 

  Here an antenna with an NMO base will thread on to the NMO mount.  Note the antenna cable comes from the mount itself.

The NMO mount in the above example is a “trunk lid” mount.  The flange to the left hooks under the lid of a vehicle trunk.

Another popular type of NMO mount is the magnetic mount.  When affixed to many metallic surfaces the mount stays put quite well.  Here is a picture:

 

nmo-mag-mount

 

A third popular type  of mount is the through-hole mount.  This  requires a small (typically 3/8″ to 3/4″ ) hole be drilled through the surface hosting the mount, and is the best choice for an extremely rugged installation.  The “NMO” part of the mount protrudes above the mounting surface, becoming accessible to the antenna itself.  Here is a picture of a through-hole NMO mount:

 

thru-hole-nmo-mount

The following external post provides a good look at a through-hole NMO mount assembly and brief description of the approach

http://www.radioreference.com/forums/radio-equipment-installation-forum/97536-install-nmo-antenna.html

 

The installation of a through-hole NMO mount and antenna is covered by this external video.  The video was shot by a fellow holding the camera in one hand while trying to perform the installation, so it is a bit shaky, but all-in-all he does an excellent job:

http://www.youtube.com/watch?v=zs-0EF7mP8k

 

Raveon can provide several NMO mounts and antenna types.  We invite your further questions.

 

 

 

 

 

Filed under: Installation Information | Posted on May 18th, 2009 by John Sonnenberg

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