[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.

Watch our in-depth review of the Zapperbox M1 ATSC 3 Tuner with DVR and A1 Antenna. Will this device revolutionize your TV experience? Find out now! #Zapperbox #TVTuner #DVRReview ...