Have just found this forum and think its brilliant! I've had a quick search and couldn't find the answer to my question so hope you can help. I have just bought a Migmate 130 turbo and decent sized co2 bottle off a friend for £50. Not a bad price I thought although he mentioned something maybe up with it. I had a play before I bought it and it worked fine. However I came to use it in anger for the first time this weekend and it worked fine for about 5 minutes before it looses an nice constant arc and starts to pulse ( prob 2 / 3 times a second???). I don't think its wire feed ( I maybe wrong) as this is fine when feeding not under arc and the prob happens after 5 minutes and goes away when left. The earth all seems ok so I'm stumped! Does anyone know if this is a common prob? Is it expensive to fix? He's a decent mate and will have the welder back if so! Really hope you can help, I thought I had cured my woeful years of a tiny migmate welder and naff wire feed!