[Towertalk] Ground Rods

[kb9cry@attbi.com]

I think I have a problem with this proposal, but I'm no 
expert so don't flame me to bad.  How is the solid 
copper wire going to be joined to the tower bolts?  The 
only secure and low resistance method would be to 
Cadweld it.  Also, the solid wire will extend out of the 
concrete block to the ground rod(s).  Wouldn't that 
allow a path for water to infiltrate into the concrete 
and then possibly start to rust away the bolts from the 
inside?  Isn't concrete conductive?  Unless one is 
constructing a Ufer (?) grounding system where the rebar 
is welded together including the tower base stubs, does 
one need to tie the base stubs to the tower ground.  
Personally, I didn't do that and ran a solid wire from 
the bottom of each leg, external to the concrete, to the 
ground rod(s).  Just thinking,  Phil  KB9CRY
> Jerry... good idea!  However, tie the three ground rods together and only
> run ONE bond to the tower from the ground rods.  Running separate bonds can
> cause grounds loops and create a whole new set of problems.
> 
> Also, if concrete is going to be poured around your ground clamps... the
> lime will eventually cause high resistance joints due to the corrosion.  I
> don't recommend "burying" ANY joint in concrete or dirt!  Unless you can
> absolutely make a pure hermetic seal!
> 
> Paul - K4BET
> 
> ----- Original Message -----
> From: "Jerry Keller" <k3bz@arrl.net>
> To: "(Reflector) TowerTalk" <towertalk@contesting.com>
> Sent: Thursday, August 01, 2002 11:19 PM
> Subject: [Towertalk] Ground Rods
> 
> 
> I'll soon be pouring a new tower base, 6 feet deep. I thought I would put an
> 8-foot ground rod at each corner of the hole, drive them in the remaining 2
> feet, tie them all together with #2 solid copper, and run the copper to all
> 3 of the tower mount J-bolts...then pour concrete around the whole
> business... any thoughts?  Jerry K3BZ
> 
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> additional 5 percent off
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