Quote Originally Posted by duaneb55 View Post
No AC weld output on the new TB. Older versions had it and it's a shame Miller did away with it on the latest model almost eliminating aluminum TIG and preventing using AC stick to combat severe cases of arc blow. The thing is, the machine produces AC which is then rectified to DC so it's already there as it was when the TB had it. Not sure why Miller left it out of the latest version.

Weld output is also 3 phase as apposed to the Bobcat's single phase which makes for a smoother although not exactly like a pure DC (i.e. SA200) output arc.
How would the pure DC (SA-200) machines give flat line DC? I'm assuming a three phase AC then rectified supply would be similar to a three phase factory machine rectified for DC. Current never falls to zero, as two more phases not in sync. would also be contributing.