This is an aluminum fabricating shop, and the salesman told me that the high freq. travels on the outer skin of the leads (what that explains I'm not sure, and I don't think he understood the explanation he was simply trying to repeat). But He was adamant that tying the negative (or whatever the proper term is for that electrode) of the output side to a nearby non-system ground rod would clear up the problem. If I get to try it out next week I'll let you know. They weld nonstop all day, and the lack of ability to use the cordless phone is inconvenient to the other company employees (non-welders) in the shop.
