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Re: [TowerTalk] Grounding Coax at Tower

Subject: Re: [TowerTalk] Grounding Coax at Tower
Date: Wed, 27 Feb 2008 18:27:53 +0000 (GMT)
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TT:The concept of having the coax and other lines leave the tower ABOVE earth 
level, is alien to me.   I've always felt that the capacitance of the coax 
bundle to earth would tend to limit a strike's current in the direction of the 
shack, in favor of the lower impedance tower connection.HOWEVER,  you COULD 
have the coax leave the tower at 10' or so,  making a solid connection to the 
tower at that level, and letting the tower be the conductor to the earth ground 
system.   The problem with flying the cable bundle, however, would seem to be 
twofold.   1)  reduced capacitance to earth, due to increased distance, and 
therefore reduced strike current along the bundle;  and 2) having the flown 
cables act as a larger loop, in the event of a nearby strike.   In the latter 
case, there would be greater current induced in the secondary turn of the 1 
turn transformer represented by the tower-cable system.  Does anyone see a flaw 
in that thinking?N2EA

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