There are a few things that you need in order to make a 75 ohm coaxial antenna: A piece of 75 ohm RG-59/U coaxial cable. A 75 ohm F-type connector. A soldering iron and some solder. A sharp knife or a pair of scissors. A ruler or a tape measure. Optional: some heat shrink tubing. Instructions: 1. Cut a length of RG-59/U cable that is about 3 feet long. You can always trim it down later if necessary. 2. Strip about 1 inch of the outer jacket off of the end of the cable, exposing the inner dielectric and the center conductor. 3. Cut a small slit in the dielectric, being careful not to damage the center conductor. 4. Slip the connector onto the cable so that the slit in the dielectric lines up with the hole in the connector. 5. Solder the center conductor to the pin in the connector. 6. Slip a piece of heat shrink tubing over the connection and shrink it down with a heat gun or a hair dryer. 7. That's it! Your antenna is now complete.