I recently installed a single-point ground system, for lightning and
surge protection. I used the Polyphaser PLDO box for the AC line,
which is very well built, but not cheap - $170. It protects the whole
station, including computers, and that makes the cost easier to
justify. In my view, you need a good low-Z ground system, including
protection for phone lines, antennas, rotators, etc. A surge arrestor
referred to the green wire will add some protection against AC line
events, but not against many other threats.
Info on the PLDO-120US15A:
http://blog.aa6e.net/2005/03/polyphaser-pldo.html
Info on the SPG at this QTH:
http://blog.aa6e.net/2005/03/in-shack-ground-system.html
73 Martin AA6E
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