>For the exercise, it would be fun to ground(sic) the far end of the Cat5 >cable and attach a multimeter to the near end (ground the other lead of >the multimeter.) > > ~1km > +------~-------[mm]---+ > | | >//// //// I read an interesting article from the Thirties once about ground currents. You drive a couple of metal rods in the ground about 30 meters apart and connect then to a telephone earpiece. You get all sorts of clicks and whistling sounds (like dolphins singing), although these days, with much more electricity used, the interesting sounds tend to be swamped out with 50 hertz humm. Wayne ------------------------------------------------------------------- To remove yourself from this list, email nzlug-request@linux.net.nz with "unsubscribe" in the body of the message.
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