View Single Post
Old 13-Sep-2015, 11:20 PM   #19
rabbit73
Retired A/V Tech
 
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,747
Besides the interference from the trees, you also have terrain interference for the signals on their way to your location:

Your weakest signal (the transmitter is at the left end; your location at the right):





Your strongest signal:





VHF signals can make it over the peaks better than UHF signals, by refraction.
Attached Images
File Type: jpg agmccallTVFprofile1a.JPG (64.0 KB, 1762 views)
File Type: jpg agmccallTVFprofile1.JPG (118.2 KB, 1729 views)
File Type: jpg agmccallTVFprofile2a.JPG (60.6 KB, 1782 views)
File Type: jpg agmccallTVFprofile2.JPG (115.2 KB, 1749 views)
__________________
If you can not measure it, you can not improve it.
Lord Kelvin, 1883
http://www.megalithia.com/elect/aeri...ttpoorman.html

Last edited by rabbit73; 14-Sep-2015 at 12:01 AM.
rabbit73 is offline   Reply With Quote