This forum runs a lot of ads for 150 mile TV antennas. Various Internet sources claim that most of the time digital TV signals won't carry usably over 75 miles. Presumably that is supposed to be due to limitations of atmospheric transmission, and/or multi-path conflicts, which produce a signal with confused timing. (Satellite dishes are different, because the atmosphere thins at high altitudes.) What is actually reliably achievable most places, most of the time?