RF Connection will sell Cadwelds at a reasonable price and RENT the
electrical gadget used to ignite them safely without singing your eyebrows
and far enough away to not breathe the smoke.
They're in a breakaway thermal foam enclosure that leaves a nice weld - a
nice knob in the case of wires to ground rods.
Be prudent - be safe.
RF Connection is a good vendor for ham radio.
(No affiliation except a customer!)
73,
Mickey N4MB
On Wed, Dec 21, 2011 at 1:35 PM, Larry <lknain@nc.rr.com> wrote:
> The RF Connection also sells CadWeld.
>
> 73, Larry W6NWS
> ----- Original Message -----
> From: "Jim Lux" <jimlux@earthlink.net>
> To: <towertalk@contesting.com>
> Sent: Wednesday, December 21, 2011 12:06 PM
> Subject: Re: [TowerTalk] Tower Grounding Questions
>
>
> > On 12/21/11 8:00 AM, Richard Solomon wrote:
> >> A friend is putting up an LM-470 and asked about grounding it. Who
> >> makes the Ground Kit for
> >> the tower ? I have a couple of DX Engineering PPC-UNI-KIT-2CT kits,
> >> will they do ?
> >>
> >> Also, what's the name of those one-shot chemical "bombs" used to weld
> >> the ground cable to
> >> the ground rod ?
> >
> > Exothermic Welding, generically..
> >
> > Erico Cad-Weld is a very popular brand (OneShot is one of their models)
> > Thermoweld is another
> > UniShot is another
> >
> > If you go to a electrical supply place, they'll carry one or more
> > brands. They'll also have the stuff you need to use it (some kinds have
> > a reusable mold and you load the charge in each time from a little
> > container). There are fancy igniters and such, as well. Do some
> > research (there's been stuff on this list over the years). I've used a
> > small torch to light them off, but I'm not sure that's actually
> > recommended.
> >
> > I've never seen this stuff at Home Depot or Lowes.. at least at the ones
> > I go to, but that doesn't mean that some don't carry them. You need to
> > go to somewhere that really caters to "trade".
> >
> > You *could* make the stuff yourself, in the fine ham radio improvising
> > way. It's just thermite... Copper oxide and aluminum powder, piece of
> > magnesium ribbon as fuse works nicely.
> >
> > What you are paying for with the commercial product is a nicely designed
> > mold and consistent mixing of the weld material. The commercial ones
> > also have a different mix at the ignition point to make it easier to
> > start (I'm going to guess some sort of black powder type mix.. a good
> > oxidizer and some fuel which gets good and hot, to get the metal
> > oxide-aluminum reaction going).
> >
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
>
>
> _______________________________________________
>
>
>
> _______________________________________________
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>
--
Mickey Baker
Fort Lauderdale, FL
“Tell me, and I will listen. Show me, and I will understand. Involve me,
and I will learn.” Teton Lakota, American Indian Saying.
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