[TowerTalk] Cadwelding to Rohn 45G and 55G

[Roger (K8RI) on TT]

I just use a large, solid "bolt on" terminal for the proper size wire on 
each leg and lots of noalox.
As it's stranded #2 I have just splayed (fanned) the 7 strands out to 
close parallel  and clamped them to the tower leg with 2 SS hose clamps, 
close spaced and lots of noalox.  As far as I can see, the parallel 
clamps with the parallel strands  is almost as good as the commercial 
ones that use a large copper terminal on a copper band around each leg.
I do position the clamps so it's the solid SS band over the wire.

73 es good luck es don't forget the noalox,

Roger (K8RI)


On 2/12/2016 Friday 11:56 PM, EZ Rhino wrote:
> I would never exothermic weld anything to a relatively thin wall tower leg.  No way.  Especially when you've never tried it before and have no skills in doing such!
>
> I've got a cast zinc clamp on my site that will fit on the tower leg and hold up to a #2 wire.  http://www.kf7p.com/KF7P/TowerLegClamps.html
>
> Chris
> KF7P
>
>
>
>
>
>
> On Feb 12, 2016, at 20:21 , Larry Loen wrote:
>
> I got a private note indicating some real-world problems (holes in the
> pipe) when Cadwelding Rohn towers on at least some occassions.  So, for the
> record, it doesn't look like a great idea to Cadweld.  Maybe I should
> simply follow Rohn's instructions and use their clamp gear.  Other gear
> recommended here probably works as well, but why not follow the
> manufacturer's recommendation?
>
>
> WO7R
>
> On Fri, Feb 12, 2016 at 12:38 PM, Larry Loen <lwloen at gmail.com> wrote:
>
>> I am in the process of putting in two new towers on my property (yes, I am
>> blessed).
>>
>> I'm a little nervous about Cadwelding to the legs.  I suppose you'll all
>> tell me it has been done dozens of times, but I have visions of blowing a
>> hole through one of the legs near the bottom of my tower.
>>
>> The alternative, I suppose, is to get a set of quality ground clamps,
>> clamp it maybe three times (I assume this would help the impedance a bit)
>> and the inspect it over time.
>>
>> I also plan to have an extensive "ground ring" around the tower.  On my
>> current crankup, I cadwelded to all three "legs" except it was easy to
>> Cadweld to a nice thick base and not to the tower, proper.  Effectively
>> required, in fact.  So, I Cadwelded to stuff that wasn't a big deal,
>> structurally.  Here it would be.
>>
>> 1.  Do I Cadweld anyway?  How to be sure the tower leg isn't weakened?
>>
>> 2.  Do I do it to a single leg or all three?  I could "feed" my ground
>> ring from a single leg, I suppose.
>>
>> This is all in excess of what Rohn shows, which is a single, clamped line
>> from the tower, but I've always taken it for granted the smart thing to do
>> is have a more extensive network.  I plan on three rods, connected as a
>> ring, and then copper "lines" out from each of them to another rod, a total
>> of six in all.  That's all easy and been done (by me) before.  Question is,
>> what's the best way to connect to the tower itself?  I have the "buried
>> tower section" type of base.  We will be pouring concrete late next week.
>> So, I have about a month to plan and execute my ground system.
>>
>>
>> Larry WO7R
>>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk


-- 

73

Roger (K8RI)


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus