I use ferrite beads for the same reason. Sometimes I use 2; one at the
radio and one right before the cables enter the house. DO NOT put them
on a ground wire since that's where you want the lightning's current to
go. Because its current has such a fast rise and fall time, lightning
behaves like ac or rf. That's why ground wires are supposed to be as
straight as possible, and if you have to bend it, you should make the
radius of the bend as large as you can. A tight bend acts as a coil
(increased impedance) and will cause the lightning to look for a better
path. Ferrite beads do the same thing. By putting a ferrite on the
cables, you still let your signals through, but it looks less inviting
for the lightning.
Jason
Jenco Wireless wrote:
Contrary to popular belief, lightning likes to follow the path of
least inductance. Inductance is the resistance to a change in current
flow. All I can say is that they have worked for me.
On 10/7/06, *Dylan Oliver* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
On 10/7/06, *Jenco Wireless* < [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
http://pdfcatalog.digikey.com/T063/1150.pdf#search=%22digikey%20240-2318-nd%22
<http://pdfcatalog.digikey.com/T063/1150.pdf#search=%22digikey%20240-2318-nd%22>
I use the 240-2318-ND (towards the bottom of the page). Just
wrap the Ethernet cable through it as many times as possible.
You have to purchase 100 to get that low, low price I
mentioned :-). We are located in Ohio.
Sounds like this is more for reducing EMI .. how do you figure it
protects from lightning damage?
Best,
--
Dylan Oliver
Primaverity, LLC
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