I did as Teleview asked and ran reports at 40 and at 60 feet. I noted that in the 60 foot report the signal reads just slightly weaker at -99.1 db on my target station CBS 2.1. That's OK cause I sure would not try to reach that height or honestly even 40 feet at my location. Here's reports:
@ 40 ft
http://www.tvfool.com/?option=com_wr...ec2f403df71931
@ 60 ft
http://www.tvfool.com/?option=com_wr...ec2f17ffb07a92
Before I continue I will remind you that I have posted that I received reception of CBS with a good up time well over 90% for almost two years no more than a mile from here at a height of 19' with my Winegard antenna.
Yesterday with help I was able to test my antenna in a couple of locations. I went higher than the 20' spot I had the Winegard mounted on a short eave mast. Here's pics of that location:
http://s807.photobucket.com/user/j_rapp/library/Antenna
The tree is approx 10-14 feet higher than the antenna. I can raise the antenna but as I'm in an HOA I don't want to go as high as 30'. Perhaps my installer can test a higher placement at this location. I think 26' would put it as high as the top of the tree.
The horizontal picture is taken from the spot where I last tested the antenna (about 21' high) on the same mast with bottom of mast on peak of roof. Yesterday I got no signal until I moved the antenna here. My Panasonic TV showed a signal strength of 67%. The best reading the few times I got one behind the tree was approx 47%. Line of sight to Mt Wilson is 100% clear of that tree while at the eave location the left side of tree blocks the right side of the antenna.