Javascript Version 2022-06-09 by Valery Kustarev, based on Rothammel / DL6WU Long-yagi DL6WU ------------------------------------------------------------- Frequency f: 1420 MHz Wavelength λ: 211 mm Element diameter d: 1 mm Boom diameter D: 10 mm Total number of elements: 16 Boom length: 930 mm Gain: 16.4 dBi (approx.) ------------------------------------------------------------- Reflector length R: 103 mm Reflector position R = 0 ------------------------------------------------------------- Dipole length F: 101.4 mm Dipole position F (R-F): 42.2 mm Gap at connection point g <= 2.8 mm ------------------------------------------------------------- Director position D1 (R-D1): 58.1 mm, Length D1: 92.7 mm Distance F-D1: 15.8 mm ------------------------------------------------------------- Director position D2 (R-D2): 96.1 mm, Length D2: 91.8 mm Distance D1-D2: 38 mm ------------------------------------------------------------- Director position D3 (R-D3): 141 mm, Length D3: 90.8 mm Distance D2-D3: 45.4 mm ------------------------------------------------------------- Director position D4 (R-D4): 194 mm, Length D4: 89.8 mm Distance D3-D4: 52.8 mm ------------------------------------------------------------- Director position D5 (R-D5): 253 mm, Length D5: 88.9 mm Distance D4-D5: 59.1 mm ------------------------------------------------------------- Director position D6 (R-D6): 317 mm, Length D6: 88.1 mm Distance D5-D6: 63.3 mm ------------------------------------------------------------- Director position D7 (R-D7): 383 mm, Length D7: 87.4 mm Distance D6-D7: 66.5 mm ------------------------------------------------------------- Director position D8 (R-D8): 453 mm, Length D8: 86.8 mm Distance D7-D8: 69.7 mm ------------------------------------------------------------- Director position D9 (R-D9): 526 mm, Length D9: 86.3 mm Distance D8-D9: 72.8 mm ------------------------------------------------------------- Director position D10 (R-D10): 602 mm, Length D10: 85.9 mm Distance D9-D10: 76 mm ------------------------------------------------------------- Director position D11 (R-D11): 681 mm, Length D11: 85.4 mm Distance D10-D11: 79.2 mm ------------------------------------------------------------- Director position D12 (R-D12): 762 mm, Length D12: 85.1 mm Distance D11-D12: 81.3 mm ------------------------------------------------------------- Director position D13 (R-D13): 844 mm, Length D13: 84.7 mm Distance D12-D13: 82.3 mm ------------------------------------------------------------- Director position D14 (R-D14): 928 mm, Length D14: 84.4 mm Distance D13-D14: 83.4 mm ------------------------------------------------------------- Elements on a dielectric boom or on a metal one, but remote from it. Boom-correction is not taken into account. ------------------------------------------------------------- Dimensions of the matching coaxial cable (balun). Length U1: 104 mm Length U2: 34.7 mm