Radio aerials, Austin, TX

An array of radio aerials all in a row, forming a phased array for broadcast. I can't tell from looking whether they are FM or AM. With AM, nearly the whole height is used for broadcast (1 MHz = 300 meters wavelength, so a 1/4 wavelength tower would be 75 meters tall). FM, on the other hand, is around 100 MHz (3 meters wavelength), and so the active broadcast element is generally just the tip. In either case, however, stacking them together in a line makes for a much more powerful and effective broadcast.