[Top] [All Lists]

Re: [TowerTalk] tower & antenna project questions

To: <>
Subject: Re: [TowerTalk] tower & antenna project questions
From: "Steve, W3AHL" <>
Reply-to: "Tower and HF antenna construction topics." <>
Date: Fri, 12 Mar 2010 15:31:16 -0500
List-post: <">>
Wiring the J-bolts and rebar is generally not considered adequate for lightning 
protection!  Welding or exothermic bonding is used for the commercial towers 
I've seen.

The Ufer tower base ground should only be used to supplement standard ground 
rods & radials.

And the current ARRL Antenna Books still recommend "minimizing the possibility 
of direct discharge path for lightning through the base."  I certainly don't 
consider ARRL books a definitive reference, but unless a ham understands the 
details of Ufer grounding, it's probably still good advice to follow.

Steve, W3AHL

Message: 5
Date: Fri, 12 Mar 2010 12:38:44 -0500
From: "Gary Schafer" <>
Subject: Re: [TowerTalk] tower & antenna project questions
To: "'Tower and HF antenna construction topics.'"
<>, <>
Message-ID: <>
Content-Type: text/plain; charset="us-ascii"

A Ufer ground is fine for a tower as long as it is not the only ground. You
still need ground rods outside of the tower base connected to the tower.

The J bolts for the tower mounting pad should be wired to the rebar inside
of the concrete. That is sufficient connection to the rebar for a Ufer
ground. You don't want any unconnected rebar gaps inside the foundation that
could arc.

Gary K4FMX


TowerTalk mailing list

<Prev in Thread] Current Thread [Next in Thread>