[TowerTalk] Tower "Electrical Height"?

[TexasRF@aol.com]

In a message dated 3/19/2005 12:36:34 P.M. Central Standard Time,  
k6rix at earthlink.net writes:

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  


_______________________________________________

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Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with  any 
questions and ask for Sherman,  W2FLA.

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One wavelength in feet= 984/f(MHz)=1537.5 ft for 640 KHz. 750 ft tower =  
750/1537.5 wavelengths=.4878. Electrical length=.4878 times 360=175.61. Pretty  
close to the FCC figure.
 
73/k5gw