Being in the broadcast industry, I would say BOTH. There are so many times
when the spark gap saved my transmitters. It will spark even with a strike
miles away. IMHO the choke will bleed off the slow build up but the gap
will take the fast strikes (and near by strikes). I do not know of any AM
station tower that does not have a spark gap. (actually multiple spark
gaps)
Also, there is a great article on lighting protection is this trade
publication: http://www.radio-guide.com/issues/RG-MAY-2007.pdf
Kent Winrich, K9EZ/4/lid/B0ZO
Fuquay-Varina, NC
On 6/19/07, William B. Stacy <wstacy@wildblue.net> wrote:
>
> I am going to install a series-fed, full-sized vertical for 160 in a few
> weeks. What I would like to find out is the preferred method of lightning
> protection (that is, shunting it to ground). There seem to be two
> methods:
> a spark gap, and a shunt coil. What are the accepted practices for
> broadcast systems these days? And yes, I am planning a set of lightning
> radials with multiple ground rods, Cadweld bonding, etc.
>
>
>
> 73,
>
> Bill, N5TU
>
>
>
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