[SEDXC] LIGHTNING
K4PI.Mike Greenway
K4PI at BELLSOUTH.NET
Thu Mar 25 17:51:08 EDT 2021
Since we are moving into that time of the year I read something funny
but sad at the same time.
*/Just a word to those who tell us that they are safe from lightning
because they always disconnect the coax from their equipment. When asked
what they do with the disconnected line(s), they usually respond that it
is placed on the floor. Now if you stop and think about the last few
thousand feet that the lightning has jumped, you can see the fallacy of
their thinking. _In fact, they made it worse_ since arcing involves
ignition temperature plasmas inside your house./_/True, the radio may
still work, if it survives the house fire./_ Throwing the coax out the
window is not a solution, especially if the coax has already entered the
house from the antenna or the antenna is roof mounted without a ground
path. Grounding switches will not last long with direct hits unless
other good ground paths are provided. Grounding the antenna line and not
disconnecting the coax shield can still allow strike energy to be shared
with the equipment The shield connects to the chassis and if a single
point ground is not present with power/telephone protectors, the
equipment will be damaged.*
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