[TowerTalk] Re cadwelding

[Kevin Kidd]

Earl,

I use 15% silphoz for wire and strap to copper clad ground rods regularly.
It takes a  lot of flame heat and you have to be careful not to carbonize
the conductor or the rod.  The silphos is more brittle than the copper so
do not braze the wire down and then try to drive the rod further.  The bond
will break...


Kevin C. Kidd, CSRE/AMD
Lawrenceburg, TN
AM Ground Systems Company  -  WD4RAT
kkidd at kkbc.com  --  866-22-RADIO -- 866-227-2346
www.amgroundsystems.com

On Tue, Nov 1, 2016 at 9:09 AM, Earl Wesner <earlw1 at verizon.net> wrote:

> I have for some time wondered about using what's known as sil-fos, or
> commonly known as _silver brazing rod_. It varies from 15% to just 5%
> silver, the remaining being copper. Has anyone tried this as a substitute
> for cadwelding? I have been a refrigeration mechanic, and we use that rod
> to connect copper to copper or brass joints (with flux) rather than
> sweat-soldering. They are high pressure joints and it seems as though it
> would work well for ground rod brazing as well. Any comments, folks?
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