Originally Posted by systems2000
At 40 miles, your best reception will be with an outside antenna mounted at least 35' off the ground. Since there are trees to contend with, I'd get an antenna that is rated for 60 miles to overcome the UHF loss, due to those trees.
AND add a Channel Master CM7777 amp at the antenna....IF the trees are close in to your house (IE: 50-100ft away and thick), RF ground for UHF starts at the TOP of the trees.....Pine trees are the worst.....they cause the most attenuation of UHF signals..
I am in typical suburbia and have trees around me but over 100ft away and they are mostly across the street in the direction of the local towers...with my RS VX-90 I have and a CM7777 at 20ft, I can watch a HD-VHF 7 50+ miles away to the east (with no trees in the immediate way) with pretty good reception....I plan to increase to 60ft with a ROHN 25G tower down the road...