The gray hoverman design was from this webpage
https://sites.google.com/site/maycre...-setup/my-sbgh
The other was from this page
http://uhfhdtvantenna.blogspot.com/
Both were outside about 15 foot high. I live on a hill with nothing blocking the antenna.
Here is the tvfool report
http://www.tvfool.com/?option=com_wr...46ae3b296a0315