SS770R: Diamond antenna phasing harnesses provide 2-port phased power division. They are designed for stacking two 2-meter or two 70-cm beams. When you connect your feed line to the SO-239 (UHF female) center, it then provides two outgoing cables terminated in PL-259 connectors. The power division will then feed two Yagi’s in phase. The SS770R can be used on both 2m and 70cm bands.