I know some here are amateur welders and wannabes like me. I came across this guy during some research on you tube and thought some might get a lot from his videos. It's an enormous pleasure to listen to a real pro that can explain things in what I consider to be a sensible practical manner.
This is NOT some hobbyist with a camera and you tube channel.
This guy seriously knows his stuff.
I have been watching his Mig basics series it will start off slow for some of you but start at lesson 3 and I would be surprised if you a self taught hobby welder if u don't pick up loads of info you did not know before.
Here is a wire speed chart calculator (scroll down the page)
it was a huge eye opener to me.
Hope this helps.....
The guy also has places in his videos where he shows how to do cross sectional tests on your welds just so you not judging penetration of weld by looks (which he demonstrates can be very deceiving )
All I think is he truly represents a real professional tradesman maybe a dying breed.