With tough-to-ignite one shots -- like when the igniting powder layer
accidentally mixes with the burn powder, I've used kid's sparklers with 100%
success. Common sense safety precautions apply: use goggles, protected arm
sleeves, and welding gloves. After starting many one-shots this way, it's
now my preferred igniting method with standard one-shots.
Although possible, I advise against trying to salvage a sparkler (i.e., stop
the sparkler burn) for more than one-shot. You want as much distance as
possible between the tip of the sparkler and your hand -- even if it means
extending the sparkler handle. A box of sparklers are inexpensive enough
that a single sparkler can be wasted on a one shot.
Paul, W9AC
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Chris
Sent: Tuesday, November 1, 2016 9:57 AM
To: towertalk@contesting.com reflector <TOWERTALK@contesting.com>
Subject: Re: [TowerTalk] Cad Welding tips
A propane torch will definitely not ignite these. It has to be a spark. If
you follow the instructions follow recommended safety procedures there
really isn't any reason to be worried about getting burned, etc. Also the
Harger Uni-shots don't throw the sparks and flame nearly as much as the
Cadwelds tend to do.
Chris
KF7P
On Nov 1, 2016, at 7:23 AM, William K Carr III wrote:
> I am about to embark on use of cadweld for bonding my ground wires to
copper ground rods.
>
> Has anyone used a pencil tip propane torch to light the cadweld? It would
offer a little more distance to protect knuckles, etc.
>
> Also, I have a K0XG rotating tower base. Richard recommends large diameter
(in my case 4AWG) stranded welding cable to ground the tower (above the
rotating base) to the ground rods. Has anyone used cadweld on stranded
welding cable successfully? Or, just go with a bronze clamp?
>
> Your experience and/or suggestions are appreciated.
>
> Kim K5TU
>
>
>
> Sent from Samsung tablet
>
> -------- Original message --------
> From Larry Loen <lwloen@gmail.com>
> Date: 11/01/2016 00:22 (GMT-06:00)
> To Gary <gary_mayfield@hotmail.com>
> Cc towertalk@contesting.com
> Subject Re: [TowerTalk] Cad Welding tips
>
> I like that idea of an electric igniter. Wish I had had one.
>
> Even the gun made me a bit nervous. This stuff is really hot. You do
> not want it touching you during the "exciting" moment and it is always
> a pretty 'instant" (startling) moment when it ignites. If your hand
> is in the wrong place when it ignites, zero chance to escape undamaged.
>
>
> Larry WO7R
>
> On Mon, Oct 31, 2016 at 5:46 PM, Gary <gary_mayfield@hotmail.com> wrote:
>
>> One shots with a battery powered igniter.
>>
>> https://www.therfc.com/cadweldnew.htm
>>
>>
>> The RFC will rent you the igniter - works awesome. Standard
>> disclaimer
>>
>>
>> 73,
>>
>> Joe kk0sd
>>
>> [http://www.therfc.com/Images/cadweldscan2.jpg]<https://www.
>> therfc.com/cadweldnew.htm>
>>
>> CADWELD Plus - The RF Connection Home Page<https://www.therfc.com/
>> cadweldnew.htm> www.therfc.com CADWELD Plus. The CADWELD ONE-SHOT
>> unit consists of the ceramic mold which contains the CADWELD WELD
>> METAL, a metal disk, a flared sleeve or sleeves and cover.
>>
>>
>>
>>
>>
>> ________________________________
>> From: TowerTalk <towertalk-bounces@contesting.com> on behalf of Bob
>> K6UJ < k6uj@pacbell.net>
>> Sent: Monday, October 31, 2016 7:36 PM
>> To: towertalk@contesting.com
>> Subject: Re: [TowerTalk] Cad Welding tips
>>
>> Larry,
>>
>> Thanks for the info. I will get the igniter gun too.
>> Safety first !
>>
>> Bob
>> K6UJ
>>
>> On 10/31/16 5:26 PM, Larry Loen wrote:
>>> You can get the one shots all over the web.
>>>
>>> This link: http://kf7p.com/KF7P/HargerUniShot.html
>> HargerR Uni-Shot - kf7p.com<http://kf7p.com/KF7P/HargerUniShot.html>
>> kf7p.com
>> What is it? Exothermic welding is a welding process for joining two
>> electrical conductors. it uses a superheated copper alloy to
>> permanently join to conductors ...
>>
>>
>>
>>>
>>> . . .includes various one-shots. Study carefully to find the exact
>>> right one, including the diameter of your ground rod. That, you can
>>> get a lot
>> of
>>> places. The real value is the little "igniter gun" farther down the
>> page.
>>>
>>> Scroll down until you find their igniter product that looks like a
>>> little gun. We had a lot of cadwelding to do and accidentally
>>> experimented. I tried a couple of other methods and frankly, as we
>>> discovered, they were dangerous. Some use ordinary sparklers to
>>> ignite these things and we had some singed knuckles when we tried
>>> that. Likewise, ordinary flint-and-steel of various sorts. Never
>>> again. Could have easily had
>> 3rd
>>> degree burns. This little "gun" version of it gets your hands just
>>> far enough away to be reasonably safe. Try and ignite it at an
>>> angle for further safety -- the stuff mostly goes straight up. But,
>>> you need a gap between you and the actual ignition.
>>>
>>>
>>> Larry WO7R
>>>
>>> On Mon, Oct 31, 2016 at 5:12 PM, Bob K6UJ <k6uj@pacbell.net> wrote:
>>>
>>>> I will be connecting no. 6 copper wire to 8 foot ground rods and
>>>> plan to bury the connections. I did my homework reading Tower Talk
>>>> archives and have concluded that I will cad weld the connections.
>>>> I am a newbie at Cad Welding any advice, and where is the best
>>>> place to get cad welding supplies ?
>>>>
>>>>
>>>> Bob
>>>> K6UJ
>>>> _______________________________________________
>>>>
>>>>
>>>>
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>> TT members have lots of helpful information and are happy to share it.
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>>
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>>>>
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>> TT members have lots of helpful information and are happy to share it.
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>> TT members have lots of helpful information and are happy to share it.
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