[John Candle]

If you can put the connectors on the coax then do it your self. Pre made is Ok. With the pre made , look in the ends of the connectors on the coax and see if the outer foil shield and shield wires are pushed in to ward the center conductor , if so , push the foil shield and shield wires away from the center conductor. I have seen coax that is so losely made that the center foam and center conductor wire move and slide inside of the outer jacket , do not use this poorly made coax. Use a coax that is tightly made. Also if using the pre made try and get the coax that has compression type connectors on the ends , they seal better on the coax then the crimp type connectors.