[TowerTalk] Tower grounding connections and foundation

[JVarney]

Thomas Noel wrote: >>I suspect the important aspect is the surface area
interfacing with soil, not the volume of dirt under or surrounding the
grounding system.<<

The volume of dirt is critical, in this document it's called the
"interfacing hemisphere."  See Page 6 for a good diagram and explanation.

http://www.lightningprotection.com/pdfs/resources/knowledge-transfer/technical-papers/principles-of-grounding-design.pdf

73 Jim K6OK