[TowerTalk] Tower "Electrical Height"?

[Dino Darling]

I need an education here...

When the FCC gives the "Electrical Height" (in degrees) of a broadcast 
tower as 175.7 degrees, what does that mean?

In this situation, I'm specifically talking about the (former) KFI tower in 
Los Angeles.  It has been my understanding that this 750' tower is about a 
5/8 wave length at 640khz.  The "degrees" leads me to believe that it is 
just under a 1/2 wave (180 degrees).

I believe the size/mass of the tower can change the actual wavelength of 
the tower just as electrical length of stepped elements are different 
depending on their configuration.  In other words, a 750' tower with a 10' 
face is resonate at a different frequency than a 750' tower with a 6' face.

Can someone help me out here?

Dino...k6rix at earthlink.net