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Subject: Re: [worldcruising] Electronics quick-disconnect
From: Jean-Marie Houle (houle.jean-marie@XXX.XXX)
Date: Thu Jan 25 2001 - 11:00:15 EST
>Hi Jack
>If you are talking about the 12v supply then I can tell you from
>experience that a common switch won't do it. The lightning just
>jumps the contacts. A large double throw knife switch will work
>better. If you have a direct hit even that won't stop it. MOV's in
>the supply line help
>but are not a guarantee. If you unplug move the wires well apart.
>As far as the antennas go I just unplug. I have not found anything
>else that works. I have lost radios etc. to lightning. I am
>talking an actual hit.
>You can put diodes back to back on the antenna center conductor of
>the coax and it will prevent damage in the event of a nearby strike
>but only if the rating of the diodes are not exceeded. Still a good
>idea.
>HIH
>Bob sv Adagio
>
>
If the antenna is used for transmitting, it is not a good idea to put
diodes on the coax. It will generate harmonics causing interference
to others. It can even cause problems while receiving if there are
strong signals present at the antenna.
There are devices desiged to protect radios from lightning.
Polyphaser has a good reputation. http://www.polyphaser.com/
The best protection for electronic equipment is to disconnect it from
ALL the cables.
-- Jean-Marie Houle houle.jean-Marie@XXX.XXX VE2AEY===================================== to unsubscribe email to: worldcruising-unsubscribe@onelist.com
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