Range for TIG?

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I got a good deal on a lightly used Miller HF-251 tig "adapter" w/ watercooled torch.    Most of our steel work is under 1/8" that gets done with a Lincoln Weldpack 155, this will be my first experience with TIG for doing AL.  My only potential power source is a ancient Craftsman 230 amp "bread box" that I use occasionally for stick on heavier stuff.The Craftsman has a full-wave bridge of 300A diodes I added years ago should I need to TIG steel.     It has outputs for high and low ranges, which overlap in the range I'd be doing light AL work (~100 amps).   Which range is better to use?Plan to rig up a foot pedal for heat control eventually have some BIG SCR's that have been waiting to find a good home...
Reply:Well..........I'll jump in first... Your question is rather decieving..If your only doing 1/8" aluminum it should be just fine..Other than that..We as a whole have no idea what your asking.....zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:You really only want use rods like 6013 on the high range. There's is less voltage on the high range. This is why some rods won't even start on the high range. You'll need a high frequency box and get your foot pedal working before trying aluminum.
Reply:Originally Posted by djackmanWhich range is better to use?.
Reply:Thanks for the replies... low range it is.