Tom Rauch wrote:
>What I would do is install rugged very close spaced spark
>gaps across the contacts, perhaps by placing the gaps across
>the leads entering and leaving the box outside the box.
>If the antenna leads are at a low RF voltage point, and it
>appears that they are, I'd put an intentional rugged gap
>from the elements to the boom.
In this particular case, it seems that the relay contacts were already
closed, and then were welded together by current flowing through them.
>> I suspect lightning hit one side of the element and the other side of
the element arced to the boom which is grounded. The relay contacts
were in the middle.<<
To cover all possibilities, it seems like you'd need three spark gaps
around the outside of the relay box: one from each side, going to the
boom, and a third one from side to side.
Thin brass strip is a great idea - it certainly makes very sharp points.
73 from Ian G/GM3SEK
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
TowerTalk mailing list