I believe that was the conclusion that Polyphaser came to in their testing
as well; that they are no more effective than a single point.
I have had a 14 el, 440 yagi at the top of my tower (@ 130 ft.) for over 25
years. Elements are grounded and so is the mast. The tower has been hit
more times that I care to know. My neighbor used to call me with a report
after a big storm.
I have had a Cushcraft Shorty Forty loading coil disappear one time. That
is the extent of the tower damage.
However, with storms in the distant 30 miles away, I can hear a discharge
arc to the sky from the top of the tower.
Jim - KR9U
__________________________
On a lightning focused Yahoo group, populated by professionals... the PhD
types, there is a war raging over the porcupine guys.
The folks who came up with them also sell them and forced their acceptance
into the IEEE specs as being OK... no, preferred.
However there are reports that they are not worth the expense and effort to
install them, people hurt, property destroyed, mostly outside the U.S.
Franklin had it right, a tall sharp point to enable the strike to make it to
ground without frying everything else around is the way to go.
Stan
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