Experience may trump theory, but scientific experiment trumps experience
EVERY time! porcupines on towers have been shown to not stop strikes. Not
any more than an owl stops birds.
David Robbins K1TTT
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: email@example.com [mailto:towertalk-
> firstname.lastname@example.org] On Behalf Of Doug Renwick
> Sent: Tuesday, July 04, 2006 14:07
> To: email@example.com
> Subject: Re: [TowerTalk] Grounding base slab and pier tower bases
> Not true in my case. Before I installed the porcupine my
> mast bleed off the charge. A number of years ago I added
> the porcupine and my mast/porcupine combo still bleeds off
> the charge. In other words, my addition of the porcupine
> did not have a negative effect. In almost 30 years I have
> not had any lightning damage. One of my mottos is
> 'experience trumps theory EVERY time' and this is another
> Subject: Re: [TowerTalk] Grounding base slab and pier tower
> If you want to minimize the chance of a lightning strike to
> your tower do
> not place a device on the top with sharp points. A blunt
> point rod should be
> placed at the top.
> The so called lightning preventers or porcupine items do
> nothing to abate a
> strike. In fact they can increase the chance of a lightning
> strike by
> providing sharp points where early streamers can form. There
> is no way to
> "bleed off" any energy from a tower as the earth can
> re-supply it many times
> faster than you can get rid of it.
> Gary K4FMX
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