Antenna's - VHF UHF HDTV and FM

[Matt193]

It's hard to say if it's going to wobble more or not; it really depends on how secure your mount is. 5 feet could make a difference, especially if it is increasing its line of sight, but then again, it might not make any difference at all. I would think getting the lower elements away from the roof wouldn't hurt.

 

[kach22i]

Thanks Matt.

While trying to answer my own question and found this informative site.

http://www.hdtvprimer.com/antennas/siting.html

However, still not the information I'm looking for on wind. It does cover wind+trees though.

Wind info here, but sort of general.
http://www.hdtvmagazine.com/forum/viewtopic.php?t=4842

The best solution is a good antenna system that is in the clear and
is adequately supported to limit sway in the wind.

Duh.

This is good info:
http://www.hdtvmagazine.com/forum/viewtopic.php?t=4842

the FCC has allowed TV antennas
to be installed 12 ft. above the highest point of the building.
This information is also provided on the FCC website.............................

... Now let's get to the wind. If we were back at our
hypothetical 1000ft tower, the wind wouldn't cause a problem.
However, we have to be back at more practical heights. At my
location I have no problems when the wind blows. The lower
your antenna goes the more the surroundings start to affect
it. The problem is not the wind, it is that the antenna
is not in a good location, and other signal paths start
bouncing of buildings, the ground, etc., etc. and cause
difficulties. That is another reason to install the antenna
as high as you can.

This matches the previous information about nearby trees affecting the signal on windy days.

http://www.doityourself.com/stry/tvanten#b

Q: How high should I mount my antenna?

A: As far above local terrain as reasonable. A difference of a few feet is probably not much help. If you can put your antenna on top of a nearby hill, then you may actually be accomplishing something, but the difference between 1 foot off the roof and 5 feet is probably not worth it. Remember with large antennas, a short mast is better because of wind loads. If your house is on top of a hill, then stay off the roof; put the antenna in your attic or in the back yard. Reception is pretty much line of sight, so try to locate your antenna where it has a clear view to the horizon in the direction it needs to point.