Yes, we could get into an argument about what "the calculator does nothing useful" means or how induction works on a disconnected wire (think of a chain of paperclips near a magnet), but since it was under the heading of "The Truth" most people would assume the author to be some kind of authority on LRL's. It's always been my opinion a non-golfer does not make a good golf club tester. I also suggest Carl do some more homework on force fields. The ranger-tell website has a diagram on the "How it works" page.
I understand some people cannot learn how to use a locator rod. Maybe they expect too much. Hold a neodymium magnet out at arms length (north seeking pole facing away), close your eyes and turn around and try to feel where north is. Like with all rod work, be casual, be cool but be ready/aware.
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