[TowerTalk] Cadwelds

[Roger (K8RI) on TT]

I think that's why they are called one shots.  I normally buy them a 
carton at a time.  They are much cheaper when you only do a few at a 
time compared to the multi use.  I just put them up on a shelf in the 
shop and once in a while I may use a couple, or the local ham club has a 
need for a few.

The multi use cad welds use a carbon block/mold which is kinda pricey, 
but you can purchase the powder in bulk and save money when doing a lot 
of welds.  The carbon blocks are too easy to loan and lose track of who 
had them last

Yes, the one shots will ignite without the fine powder, but I used a Oxy 
Acetylene torch with a 00 or 000 tip. Just don't get the tip too close 
to the powder, or it too becomes a "one shot".  A small arc, or even a 
"sparkler" will do it, but "USE CAUTION",  a welding helmet, and welding 
gloves.  It's extremely bright and nothing will put that fire out 
safely.  It will burn right through concrete. I really do not recommend 
the alternative methods of ignition.

  73

Roger (K8RI)



On 3/29/2015 8:17 AM, Gary "Joe" Mayfield wrote:
> A while back I rented an electronic igniter for one shot exothermic
> connections. It came in the mail and then I mailed it back.
>
>   
>
> The molds were single use items.
>
>   
>
> I can't find where I did that..  A little help?
>
>   
>
> Thanks and 73,
>
> Joe kk0sd
>
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-- 

73

Roger (K8RI)


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