You have a problem. Your scanner has a BNC antenna jack, but your base or mobile antenna has a PL-259 plug. What can you do? Well, you could buy an SO-239 to BNC adapter. That will work, but it puts physical stress on the radio's antenna connector. The smarter answer is the Associated SO-239 to BNC cable assembly. This cable is made with 4 feet (1.2 m) of low loss LMR-100 cable (not RG-175!). It has an inline SO-239 jack at one end and a BNC male at the other end. Works great and there is no stress on your radio's antenna jack.