I have a Miller Thunderbolt AC as well and it does run 6010, but with a DC converter box. I've had that old Thunderbolt for almost 20 years, and until just recently, never tried 7018 or 6010 on it. I knew not to try 6010, since that is a DC only rod. Surprisingly, most 7018 has difficulty. The 7018 AC from the big box store is another story. Runs great and looks great. Strong too. It's my rod of choice for hard to weld steels; just preheat a little more than those "miracle" rods. When Covid kept me in, I started communicating with one of my welding friends over the Internet. He told me that you have to be able to use 6010. I don't like the smell of burning 6011, and I found out I don't like the smell of 6010 either. They smell like forest fires, and the smoke gets in my clothes. I welded up some machine guards, though, and the fast freeze was excellent, so I still buy them. Anyway, I found some diodes at a good price and wound some chokes, and whaddya know, I can run 7018 and 6010. The cost was very low. The funny thing is that I am almost out of 6010. I only got a few rods in a garage sale find. I have several boxes of 6011. It does all I want.I have a Miller Thunderbolt 210 (220V) and it does NOT run E6010. I was very disappointed with this!
I immediately called Miller, and they confirmed that the machine will not run 6010. They recommended that I use 6011, information which I was well aware of. However, I like 6010! It is by far my favorite stick electrode.
I have a Miller Thunderbolt AC as well and it does run 6010, but with a DC converter box. I've had that old Thunderbolt for almost 20 years, and until just recently, never tried 7018 or 6010 on it. I knew not to try 6010, since that is a DC only rod. Surprisingly, most 7018 has difficulty. The 7018 AC from the big box store is another story. Runs great and looks great. Strong too. It's my rod of choice for hard to weld steels; just preheat a little more than those "miracle" rods. When Covid kept me in, I started communicating with one of my welding friends over the Internet. He told me that you have to be able to use 6010. I don't like the smell of burning 6011, and I found out I don't like the smell of 6010 either. They smell like forest fires, and the smoke gets in my clothes. I welded up some machine guards, though, and the fast freeze was excellent, so I still buy them. Anyway, I found some diodes at a good price and wound some chokes, and whaddya know, I can run 7018 and 6010. The cost was very low. The funny thing is that I am almost out of 6010. I only got a few rods in a garage sale find. I have several boxes of 6011. It does all I want.