Dynasty 200 contamination issue - help!

[walt]

Thanks guys...

I have taken the whole setup to General Air (our local welding supply) and the problem is exactly the same there. I'm thinking this has to be an issue with the cleanliness of the metal rather than the machine, because we hooked up a Lincoln PrecisionTig and found the same...

[walt]

This is a repeat of a post I made to a bicycle building forum - you can find that thread (including a couple of photos) here: http://www.frameforum.net/forum2/ind...opic=2938&st=0

Ok, at this point, this issue has confounded me, the good folks at General Air, my old welding...