Hy-Gain 173BA Rev 1.0 18.125 MHz 3 elements, inches 4.0000 1.2500 0.8750 0.4375 0.000 3.6250 69.3750 55.0000 44.6250 86.000 3.6250 69.3750 47.0000 42.1250 189.250 3.6250 57.3750 47.0000 50.5000 This design is a modification of the HG203BA. It was developed by Hy-Gain using YO 4.0. VSWR only verified. RC 9-8-93