FWIW, I have 3 F12 yagis, which have been up respectively 20, 19, and 16
years, so far.. On none of them did I use anything but the standard
rivets. I'm sold.
73, Pete N4ZR
Download the new N1MM Logger+ at
<http://N1MM.hamdocs.com>. Check
out the Reverse Beacon Network at
<http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.
On 8/8/2015 4:37 PM, JVarney wrote:
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
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