First of all, I'm a novice where taransmitting antennas are concerned.

It seems to me that many AM "broadcast band" antennas are four-footed
towers. Do these towers merely serve to hold the actual antenna (a "wire")
off the ground vertically. The "wire" runs up the center of the tower?

FM and TV (and some AM) towers tend to be slim "guyed" towers with some sort
of antenna element(s) at the top. Is this correct? Is the actual tower ever
a radiating element?

Also... Some tower structures (AM, FM & TV) tend to be cited on hight
ground -- mountains or atop high buildings. Other antenna structures tend to
be intentionally located on "low" flat ground. Why the difference?

Thanks,

Dave Pitzer
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