Measure the Characteristic Impedance (Zo) of an Unknown Coax (052)

So, you just found a roll of coax that you'd like to use, but it is unmarked. You have no idea what its characteristic impedance is. How can you measure that? In this video I am going to show you three ways to accomplish this task. Two of these methods use something like the nanoVNA or similar device. The third method uses a time domain method which has been around for a very long time. All three methods are quite simple and straight forward. SPEED OF LIGHT VALUES ----------------------- 11802.85E6 inches/sec ... 11802.85 mega-inches/sec 29979.24E6 cm/sec ... 29979.24 mega-cm/sec Time Markers for Your Convenience ---------------------------- 00:05 Introductory comments 01:13 The VNA Methods 01:15 Measurement Preparations 04:27 VNA WAY #1: 1/4 Wavelength Method 06:24 VNA WAY #2: L/C Method 09:18 The TDR Method 14:54 Debriefing: Three Results Compared 15:45 Final Comments & toodle-oots 02:08 First Video in the VF series 10:21 Measuring VF: TDR Method Video -----------------------------