I have a friend that lives at a cabin @ 5,500' near Tonopah. When i camp at Crawley lake we talk simplex quite a lot. It's probably a 120 mile line of site link. When i go low power on my Hytera, about 10 watts, he looses me. He is on a Kenwood and the same happens, i loose him for the most part on low power. The Hytera does pull a little bit. Also tried using HT's and no way. I'm using a Copper J-Pole on my end, he has a Larsen Dipole on his. Power does work in odd ways in UHF but i know in this situation it defiantly helps.