Here's some basic antenna stuff..FM broadcast is subject to mutipath, the same thing which caused "ghosting" (multiple images) on the old analog TVs. In FM stereo, multipath causes stereo separation to degrade and introduces distortion. The solution is a directive antenna, which "ignores" reflected" AKA multipath signals from the back and sides (technical term is "front to back and front to side ratio" ) and responds only to the signal from station it is pointed directly toward. They are big, 6 to 8 foot boom antennas , and require a rotator if stations from different headings are desired , but the rotator can be used to "fine tune" the direction for the clearest signal. Coaxial cable is a must, but can be run just about anywhere - underground if necessary.
Old ANALOG TV antennas can also work, the "FM" band was squeezed between Ch 6 and 7 on the old system but remember, the new HD TV system is UHF (400MHZ and above) only, with some rare exceptions and THOSE antennas do NOT respond well to 87-108 MHZ FM broadcast, unless the maker added an element for FM. Some do.
An old TV antenna can also make a pretty good directive scanner antenna when mounted with the elements pointed vertically. FM antennas used to be mounted only with the elements parallel to the ground, when FM began to become popular in vehicles, broadcasters switched to "circular" "polarization, which the veritcal AM whips on vehicles would respond to. Should you install an outdoor FM antenna and find it not performing well in "horizontal mode" try turning it 90 degrees most good "outdoor" FM antennas have two sets of holes on the boom to give you a choice.
