Without going back to do the research, I believe that Jakeru was getting excellent results at about the 12% He level, which would be a significant cost savings over buying pre-mixed 75%ar/25%He. That is of course assuing that one fell in love with the idea of using Helium on a regular basis. I believe that people only use helium when absolutely necessary. I have a thread on this forum from waqy back where I got a bottle of 75%HE/25%Ar to try to weld a cylinder head, and due to my inexperience more than anything, it did NOT go well. Bunner of it is that my dad was involved, as I didn't at that time have my own account at the LWS, and he raised a stink, so I turned in the 90% full tank rather than listen to his yammering, so my experiments with Helium were put on hold. As soon as I get a TIG machine again, I will resume experimenting. As far as consistency, my educated guess is that since my shower faucet ends up at the same 2 spots relatively consistently (regular shower, and HOT shower), I think there will be a spot or 2 on the faucet in this application that I'll be able to mark as the general start point, and fine tune from there. If you're familiar with the movie "Spinal Tap" you'll remember that Nigel's amps are custom made to go up to "11" for when you need that little xtra oomph to put it over the top. I look at the addition of Helium as turning your TIG welder up to 11!Originally Posted by DaveO
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