[TowerTalk] Shack ground

Jim Brown jim at audiosystemsgroup.com
Thu Jun 17 09:09:43 PDT 2010


On Wed, 16 Jun 2010 22:08:24 -0400, Mickey Baker wrote:

>K7DD is right. Bond to your SPG with as big a wire as you feel you can
>afford. 

Right. 

>Longer path = bigger wire. 

WRONG! Lightning is NOT a DC event. It is a TRANSIENT, with its energy 
centered around the AM broadcast band and extending for several octaves 
either side (that is, from about 200 kHz to about 5 MHz). INDUCTANCE is 
what matters, and that is proportional to length. The only benefit of a 
bigger conductor is that the conductor can discharge more of the event 
before it vaporizes. :) 

73, Jim Brown K9YC




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