On Thu, 02 Apr 2009 20:02:25 -0500, James Waldby wrote:

On Thu, 02 Apr 2009 17:12:04 -0500, Karl Townsend wrote:

I have an older Lincoln Idealarc 300/300 AC/DC/TIG combo welder that has
served well. Got it for $400.

I can't weld AL for beans with it. My son can make it do anything. he's
pressure test welded many AL irrigation pipes among other projects.

My old eyes can't tell if there's a weld puddle with AL.

Karl

Have you tried using a blue or green lens?
http://www.saber.net/~jere/Weldingaccess.html has inexpensive
($10) blue lenses while expensive ($315) green ones are at
http://www.tinmantech.com/html/tm2000.php . Someone who thought
using green lenses was a great invention got a patent on it...
http://www.freepatentsonline.com/5170501.html

Those are for welding with O/A, not TIG.