> So I conclude that lightning energy impinging on a buried coax cable
> will at most have a surface/shield current flowing on it, which can be
> shunted to ground by a properly applied ground connection at the SPG panel
> outside my house/shack.
That is generally the case, the exception would be if the shield had
a high resistance or open connection...or of course if you had a
large antenna hanging on the cable that was not balanced for DC.
Since lightning is like RF, it tends to follow the surface of
conductors because that is the area enclosed by the fewest lines
of flux (lowest impedance).
Absolutely the best thing is disconnecting the antennas and power
line cables from you station when not in use. Don't depend on
lightning arrestors!
I have a dislike for lightning arrestors, because I field about one or
two calls a month from people who have amplifier problems caused
by lightning arrestor problems.
73, Tom W8JI
W8JI@contesting.com
List Sponsor: Are you thinking about installing a tower this summer? Call us
for information on our fabulous Trylon Titan self-supporting towers - up to
96-feet for less than $2000! at 888-833-3104 <A
HREF="http://www.ChampionRadio.com";>
www.ChampionRadio.com</A>
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
|