Whats the best radio frequency to program into my ipod fm transmitter?
Try to search the entire FM band in your area by tenths and find the one farthest from any broadcast. For example if you have activity on 88.1 and 88.6 in your area try 88.3 or 88.4 to see which one has the least interference. (You may have to do this across the entire band to find the best choice.) The signal strength from radio towers varies everywhere so there isn’t any one answer that is best, it depends on where you are, Your neighbors 10 miles down the road might find suitability with one of your rejected frequencies.
