[TowerTalk] Cadweld failing to ignite

[K8RI]

On 1/21/2013 5:31 PM, Gene Smar wrote:
> Jonathan:
>
>      Consider this failure a learning experience and try another
> OneShot. Don't risk injuring yourself by fooling around trying to ignite
> a highly exothermic reaction manually.
>
>      Caveat Amateur.
>

I agree with Gene.
When I said I "don't recommend"
I should have been much more emphatic.

CadWelds(TM) whether "one shot" or the reusable graphite are *dangerous* 
under the best of conditions.
Wear proper safety equipment and never get your face near, or over the 
charge. Do not look directly at it either as it can be bright enough to 
damage your vision. Thermite can burn right through concrete so you'd be 
hard pressed to find something that would put it out.  Wearing synthetic 
pants and/or shirts when using them is also dangerous.

73

Roger (K8RI)

>
> 73 de
> Gene Smar  AD3F
>
>
> ----- Original Message ----- From: "K8RI" <K8RI-on-TowerTalk at tm.net>
> To: <towertalk at contesting.com>
> Sent: Monday, January 21, 2013 4:53 PM
> Subject: Re: [TowerTalk] Cadweld failing to ignite
>
>
>> On 1/21/2013 4:23 PM, SPWoo wrote:
>>> Hi All,
>>>
>>> I'm having a problem where one of the cadweld one-shot doesn't have
>>> any of the igniting powder in it.  From what I've gathered the main
>>> powder material needs a very high temperature to ignite.  So far I've
>>> tried a torch (MAPP gas) but still the main powder fails to ignite
>>> despite the powder was glowing red.  Someone has suggested using a
>>> magnesium fire starter.  I didn't have any problems lighting the
>>> other cadwelds with a flint but what does one do if there's no
>>> igniting powder?  Your help is greatly appreciated.  73.
>>>
>>
>> Just a propane torch should ignite them.  I've ignited them with match
>> heads from the old kitchen matches, which isn't very safe and I do not
>> recommend.
>>
>> If it was glowing, it should have ignited.
>>
>> We're missing something.
>>
>>
>> 73
>>
>> Roger (K8RI)
>>
>>
>>>
>>> Best Regards,
>>> Jonathan Woo, W6GX
>>> (970) 646-1711
>>> _______________________________________________
>>>
>>>
>>>
>>> _______________________________________________
>>> TowerTalk mailing list
>>> TowerTalk at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/towertalk
>>>
>>
>>
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>