[TowerTalk] Buried section base...and lightning protection.

[Douglas Ruz (CO8DM)]

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 at earthlink.net>
To: "Douglas Ruz (CO8DM)" <co8dm at frcuba.co.cu>; <towertalk at 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 at earthlink.net>
>> To: <towertalk at 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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>>
>