On 17/04/2010 at 09:53 Paul A. Cianciolo wrote:

>Currently I am using 3   2 meter ground rods spaced 2 meters apart  and 1
>meter distant from the concrete basement wall of my shack.

You may find this of interest.  We have found at 87 kHz (cave radio frequency) 
that you do not get the full benefit of multiple ground rods unless they are 
spaced by at least twice their depth.  In your case this would need to be 2 m 
or more.

John F5VLF