Jul 02, 2015 - 08:20 AM
All tower are not created equal or designed with climbing access in mind. An important thing to know about AM towers is the tower IS the antenna. The entire tower is energized with the RF signals that are being sent out to the radio listeners. The picture below is from a set of 3 AM towers in Rockville, MD. This particular set of towers had to be re-lamped (have the light bulbs changed) every year. Some poor soul, me in this case, would get to go do all 3, one right after the other. That's not even the bad news - notice how far apart the horizontal "steps" are. I am 5 feet tall and the step is about mid-thigh on me! Luckily, these particular AM towers are shorter than others, around 200'.
Regarding frequencies: AM towers are generally 1/4 of a wavelength. A 400' tall AM tower is tuned to, or transmitting an AM frequency where the wavelength is 1600' long.