[RFI] Daisy chain vs Common Ground in Shack

[Sean Waite]

Jim,

Thanks for the reply. I bought a copy of the book on Kindle and have
started reading it.

The mixup on the coax braid was you talking of stripping it. I thought you
meant strip it from pieces in use, not strip it and use the braid as the
ground bonding. Thanks for the clarification, I just had misread.

73,
Sean

On Wed, Jun 7, 2017, 21:16 Jim Brown <jim at audiosystemsgroup.com> wrote:

> On Wed,6/7/2017 3:04 PM, Sean Waite wrote:
> > Any idea how far apart is too far for the ground rods to be bonded? I've
> > got a new (well, old, new to me) antenna going up. It's a cushcraft R7
> > vertical, and is about 125' straight line from my service ground. I've
> > considered sinking a ground rod next to it and bonding the antenna to
> that,
> > as once I meander through the necessary path I'll probably have over 200'
> > of wire to make it.
>
> Yes, there should be a ground rod at the base of that antenna, bonded to
> the coax shield. BUT -- any wire from there to reach the house is so
> long that it is a big inductor. Remember that lighting is an RF event,
> not a DC event. So bonding it to the house ground may not be very
> effective. Indeed, my practice is to add a common mode choke on the
> feedpoint of that antenna, just like any other.
>
> You really need to study Ward's book on grounding your home.
>
> 73, Jim K9YC
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