>    I was checking out some of you folks web sites and one of them had an article (pdf) about gas pipe lines and how  signals were sent down them to >check them out. I started to read it and was called away and haven't been able to locate it again. Does anybody know who's site it was? Thanks

 

I think there was something else too, but BMU posted this link  http://www.radiodetection.com/doclib/RDTheoryManual_complete08_en.pdf

 

            Most interesting.

 

            Eddie G3ZJO