[AT] Garden tractor???/Now RF hazard

[Don Bowen]

charliehill wrote:
>   I've always wondered how much RF 
> load I was getting and how much danger I was in while I was right around the 
> base of that tower.   Anyone got thoughts on that?
>   
Every tower or antenna location has to have an RF total exposure 
calculation and must be kept within limits.  The limiting factor s are 
frequency and power.  Many towers have high frequency antennas at at 
various locations.  The farther away the antenna the lower the exposure 
so a very tall tower with UHF or VHF antennas at the top will have very 
little exposure at the base.  Consider the exposure as the inside of a 
sphere, double the distance is 1/4 the exposure.

On the lower frequencies the entire tower is the antenna.  At those 
frequencies higher exposures is less of a concern.  That is why exposure 
to household power at 60 Hz is of minimal concern. 

-- 
Don Bowen           KI6DIU
http://www.braingarage.com/Dons/Travels/journal/Journal.html