Diamond Antenna CR8900A Quad-Band FM Mobile Antennas Pull in the signals with Diamond Antenna CR8900A Quad-Band FM Mobile Antennas. Designed specifically for your Yaesu FT-8900 or FT-8900R radio, these antennas are pre-tuned to give the best SWR bandwidth over the FM portions of the 10m, 6m, 2m, and 70cm ham bands when mounted on the side of your vehicle. Plus, Diamond mobile antennas offer a "one-touch," fold-over hinge that allows for easy access into low-overhead buildings.