LF: Gas pipe

["JOHN FICKES" <jfickes@netins.net>]

     Hello fellows

    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

                      John  kc0bmf