View Single Post
Old 27-Apr-2012, 2:46 AM   #13
GroundUrMast
Moderator
 
GroundUrMast's Avatar
 
Join Date: Oct 2010
Location: Greater Seattle Area
Posts: 4,762
System safety is my primary reason for advocating grounding the coax shield and mast.

In the cited gatech article, it appears that the author has not completely shielded the antenna. Rather they simply produced a more directional antenna, which is an effective means to receive less interfering signal from the sides and rear while receiving as much or more desired signal from the front.

Operation of coax shielding is explained briefly in the following. Grounding adds little if any improvement in the inherent shield properties of properly connected coax.

http://en.wikipedia.org/wiki/Electromagnetic_shielding

http://en.wikipedia.org/wiki/Faraday_cage

To stop the antenna from receiving all interfering signals would require shielding it completely which would also prevent the antenna from receiving desired signals.

If the assertion is that, 'grounding the coax shield somehow reduces the antennas reception of interfering signals', I disagree.
__________________
If the well is dry and you don't see rain on the horizon, you'll need to dig the hole deeper. (If the antenna can't get the job done, an amp won't fix it.)

(Please direct account activation inquiries to 'admin')
GroundUrMast is offline   Reply With Quote