Sorry you had trouble with the weather. As bad as it was I think we can look to western Kentucky and see that things here could have been worse. So tell me, what happens when ice accumalates on an antenna?greg.hahn said:All in all the Louisville stations came out well, though the majority of the FMs were operating at reduced power due to antenna ice.
In the very simplest of terms, an FM antenna works best at 1 frequency, and that frequency is a function of it's physical dimensions. Adding ice to the antenna temporarily alters those dimensions, resulting in less efficient signal transmission. Some transmitters can tolerate this more than others, but most of them will reduce power output to protect the system from damage. This, along with the amount of ice on a given antenna, is why some stations are affected to a greater or lesser degree than others. Worthy of note is that the temperature drops about 1 degree per 300' of elevation. As such, not seeing ice on the ground is no guarantee that there's not ice several hundred feet up a tower. Generally, FM antennas are located at the top or near the top of the tower (unless a TV station on the same tower already occupies the top spot).KyDXIn said:Sorry you had trouble with the weather. As bad as it was I think we can look to western Kentucky and see that things here could have been worse. So tell me, what happens when ice accumalates on an antenna?greg.hahn said:All in all the Louisville stations came out well, though the majority of the FMs were operating at reduced power due to antenna ice.