First of all 7014 is not a low hydrogen rod. It is an iron powder type rod. Secondly, on an AC machine, there is no such thing as reversing the polarity. AC means alternating current. 7018's made specifically for AC machines will work better on them than the standard 7018. That's why they make them. A standard 7018 is designed to be used on DC reverse polarity or AC current but on the cheaper AC welders, they can be more difficult to weld with than the 7018 that are made especially for AC machines. 7018 are usually the only rods that are stored in a rod oven. 7018 are low hydrogen rods and way stronger than 7014. As long as other rods are kept dry, they shouldn't have any problems. Some rods like 6011 or 6010(DC) can dry out too much. 6011 although a rougher looking weld will be easier to strike an arc with using an AC machine. Dave
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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