I will upload a video on feeding in just a bit...here it is https://welderskills.com/programs/ws-feeding-tig-rod-9b7465

Nice work

I will bring your question up. Brad has a great understanding of this topic

Rule of 33 works better on steels.

Thanks Martin

Thanks. Glad you liked it

Great insights Martin. Matt and I had a conversation after shooting this video that brought up some of these concepts. Just like new guitar amplifiers try to mimic old guitar amplifiers with tubes, newer inverters seem to have features that are an attempt to mimic the old machines.

great video JD. successful repair!

JD knows dual shield. 

hey Martin, good question.  One thing to always check when asked to weld unknown aluminum is if it has any original welds....or is it strictly mechanical fasteners.  That might be difficult on a car frame but since the unweldable alloys like 7075 aluminum are typically stronger than weldable ones, sometimes manufacturers opt for those to save weight.

in the aviation world, if you see a part that only has rivets and no welds, you pretty much know its 2024 or 7075 and you don't weld it. 

There are exceptions to every rule but with lots of technical data stating 7075 and 2024 are not recommended for welding, a welder would be smart to decline those type jobs.

hope this helps,

jody