Bob,
I have used about 25 Cadweld One-Shot devices with really no problems.
Once, one of the two wires backed out a bit and was not welded. There is no
pouring of metal and igniter material, it all comes in a small drop-in
container. I bought most of my Cadweld devices on e-Bay and paid $5 - $7
for them. You can go to the Cadweld site to determine which part number you
will need.
I have not bought or used the very expensive electric Cadweld igniter for
these units. I use an small tip acetylene torch to ignite the charge. MAPP
gas type torches are not hot enough. I have not had to use the clay seal
KF7P uses although I have seen other videos where it was used.
To me, there is really no advantage of one unit over either unit. They both
work fine.
Ray,
N6VR
On Mon, Oct 31, 2016 at 5:55 PM, Bob K6UJ <k6uj@pacbell.net> wrote:
> thanks for the info Joe
>
> Bob
> K6UJ
>
> On 10/31/16 5:46 PM, Gary 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/ca
>> dweldnew.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
>>>
>> Harger® 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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>> TowerTalk is for discussion of tower and HF antenna construction topics.
>> TT members have lots of helpful information and are happy to share it.
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