[k3ng] built his own automatic antenna tuner. First, it measures the SWR of the line by using a tandem match coupler. This device allows the forward and reflected signals on the line to be extracted.

As strange instruments go, this one might take the biscuit. It’s an automatic piano with just four keys, and, as soon as you press a key to play a note, the whole set of four move quickly away, ...

This was certainly true for 11-year-old Jude Nyame Yie Kofie, who recently captured hearts on a local Colorado news station ...