[Amps] RF Ground for 2nd Floor

[Richard]

>The ground you put in the concrete i.e. the rebar would not be optimum.
>Concrete is a very good insulator. The common 8' copper clad steel grd rod
>is hard to beat. 

€  At 1.8 - 30 MHz, in garden-variety soil, RF penetrates only a few 
inches.  Thus, an 8' gnd rod has substantially less RF-R if it is buried 
horizontally, just under the surface than if it driven in vertically.  
However, a vertical ground rod works ok at 60Hz.  At the frequency of 
lightning {c. 100kHz} horizontal would still have the least RF-R.  In 
order to protect from a direct strike, the feedline needs to be 
disconnected and tossed out the window.

>...

-  R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, 
www.vcnet.com/measures.  
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