Brad Goodman is there any white papers on the subject? the industry usually researches every aspect so someone must know exactly why.

i think overpowering the argon is unlikely. the moisture interfering with the ionization of the gas ?? striping the charge off the argon where the argon hits the air?

or is it simply the air pressure changes with humidity? regulators are referenced to air pressure. changing air pressure will change argon pressures, but i have no idea whatsoever by how much.

good question. i would like see some info on that.

i have used 1/8 on aluminum and found the grind doesn't ball/change much at all which really helped. however i'm curious on the effect on gas flow/velocity when using such a thick tungsten with a small cup.

thank you for that. there's a few tips in there for me to try out.

big question is how does humidity effect it when the weld is covered in argon?

what things would you recommend to help someone go from being an ok tig welder, to a great tig welder?

the use of pulse for helping with heat input and focus.

from a repair guy, dealing with contaminated materials. i sometimes use gas lens with cheap replaceable screens (eg ck gas saver) or no gas lens at all, due to the contamination popping and fouling the gas lens.  

how useful is independent amplitude for aluminum tig?

pros and cons to spending more time getting better fit ups so your welding is easier/better.

how do you organize all the different cups/gas lens/tungsten's etc ?

what i think is more interesting is the difference between the penetration on the  1/2 and 1/4". the 1/2 is pretty small in comparison.  it would be interesting to compare to a weld with the arc focus more on the thicker material.