Jim,
This is great...my qth is very small, so, i need optimize my ground system
at the base.
The base is about 12 ft from my shack and i have the radios connected to a
single ground rod. This single ground rod is in the middle between the shack
and the tower base.
Can i connect that single ground rod to the AWG 4 at the tower base ??? or
Is it better separated ground system for the radios, PC, etc at the shack ?
Thanks
73....Douglas, CO8DM
"No creo que haya alguna emoción más intensa para un inventor que ver alguna
de sus creaciones funcionando. Esa emoción hace que uno se olvide de comer,
de dormir, de todo." - Nikola Tesla
----- Original Message -----
From: "jimlux" <jimlux@earthlink.net>
To: "Douglas Ruz (CO8DM)" <co8dm@frcuba.co.cu>; <towertalk@contesting.com>
Sent: Monday, January 04, 2016 6:25 PM
Subject: Re: [TowerTalk] Buried section base...and lightning protection.
On 1/4/16 12:15 PM, Douglas Ruz (CO8DM) wrote:
Jim,
Thanks for the idea...Are those extra 22 or 23 ft of AWG 4 bare copper
connected in some place of the buried section ???..
Just run it generally around the buried section. Concrete is fairly
conductive, and you've got a lot of surface area.
73....Douglas, CO8DM
"No creo que haya alguna emoción más intensa para un inventor que ver
alguna de sus creaciones funcionando. Esa emoción hace que uno se olvide
de comer, de dormir, de todo." - Nikola Tesla
----- Original Message ----- From: "jimlux" <jimlux@earthlink.net>
To: <towertalk@contesting.com>
Sent: Monday, January 04, 2016 1:12 PM
Subject: Re: [TowerTalk] Buried section base...and lightning protection.
On 1/4/16 8:58 AM, Douglas Ruz (CO8DM) wrote:
Hi,
I am almost ready to build a Buried section base for a 25G tower.
The hole is 2 x 2 ft and almost 3 ft deep...is it ok for a guyed
tower?...it is almost half cubic yard...and about 2000 pounds of
concrete...no steel bars inside.
Any tips are welcome.
I need some ideas about the lightning protection...How can i do a good
connection to the tower legs to the ground rod ?...
You're burying 3 feet of section in the concrete. That makes a fairly
good connection. A typical Ufer ground has 20 feet of conductor (which
doesn't even have to be continuous). You've got 9 feet with just the
vertical part of the legs, and probably another 10 feet with the cross
braces.
While you're at it, though, I'd get 22-23 feet of AWG 4 bare copper and
put that into the concrete (leaving a couple feet sticking up in the
air) with the base. It's a lot easier to connect to a piece of copper
wire than trying to clamp onto the tower leg, and sooner or later,
you're going to want to hook something up to "ground".
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