Timothy L Warner

My practice is consulting engineering primarily for FM radio, including translators, to provide the best service in each particular case. FM radio propagation varies with time and location. The standard FCC predictions are good for averages, but incomplete. They are also less accurate for very high antennas, for terrain that departs from the FCC definition of "normal, " and for lower power levels.

The FCC contour methodology was developed when radios had tubes, maps were on paper, and slide rules were the fastest computers. Digitized terrain and more advanced propagation models can improve predictions. The FM band is also much more crowded than originally planned, so that interference is more often the limit on reception than the signal fading into noise.