You are correct regarding there being energy into the
gigahertz range existing due to quick rise times (usually 2 us).
ENERGY at dc is the MAJOR component, however.
Perhaps DAMAGING ENERGY would be more appropriate a description.
73,
Bob AA0CY
----------
From: David Robbins[SMTP:k1ttt@berkshire.net]
Sent: Friday, May 08, 1998 4:54 PM
To: Bob Wanderer
Cc: 'Tom Rauch'; 'Tower Reflector'
Subject: Re: [TowerTalk] Cushcraft Lightning Arrestor
Bob Wanderer wrote:
>
> Yes.
> Most of the energy in a lightning strike is at dc and that's what causes the
> bulk of the damage. By dc blocking (which was a patent held by the PolyPhaser
WRONG! unless you consider a rise time from zero to maybe tens of
thousand of
amps in a couple microseconds DC.
DC blocking would only help in blocking a slow build up of static such
as
occurs before a lightning stroke or under a cloud that is charged but
not
enough to initiate a stroke. these voltages can reach high enough to
damage
equipment and would be removed by a DC block, but not a lightning
stroke.
--
David Robbins K1TTT (ex KY1H)
k1ttt@berkshire.net or robbins@berkshire.net
http://www.berkshire.net/~robbins/k1ttt.html
--
FAQ on WWW: http://www.contesting.com/towertalkfaq.html
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|