[TowerTalk] I need help with VHF link...

Scott Townley nx7u at arrl.net
Fri Oct 6 20:51:29 EDT 2006


a *rough* approximation is d=sqrt(2*h1)+sqrt(2*h2), where h1 and h1 are the 
heights (in feet) of the two towers and d is the distance in miles.  Would 
need to be a bit less than that for true LOS.



At 11:57 2006-10-06, Merlin-7 KI4ILB wrote:
>  I am looking for a way to figure out how high a tower needs to be to 
> have a line of sight shot on another tower. In other words I need to know 
> how high 2 antennas need to be, on different towers (VHF) in flat terrain 
> to be able to make a link between the two.
>
>Does anyone know of a web site or such that has the formula to do 
>that...better yet one I could plug the numbers into?
>  Thanks
>  Joe KI4ILB
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