SL FM Yagi - 6el Free Space Symmetric 98.000 MHz 14 6061-T6 wires, inches rfs = -15 ; org space = -15.0" des = 0.00 ; org space = .000" drs1 = 10 ; org space = 10.0" drs2 = 54.5 ; opr space = 54.5" drs3 = 70.75 ; add space = 70.75" drs4 = 90 ; add space = 90.0" dia = .392 ; dia for ALL ELEMENTS dia1 = .375 ; 3/8" for -not used rfl = 29.5 ; org length = 29.5" dr1 = 26.25 ; org length = 26.25" dr2 = 26 ; org length = 26.00" dr3 = 26 ; org length = 26.00" dr4 = 26.25 ; org length = 26.25" len = 27.75 ; drv el half-length; org length = 27.75" sp = 1.824 ; drv el upside spacing: c/b = 1.824" nsp = -1.46 ; drv el downside spacing: c/b = -1.46" 1 0 -len nsp 0 len nsp dia 1 0 -len sp 0 len sp dia 1 0 -len sp 0 -len nsp dia 1 0 len sp 0 len nsp dia 1 rfs -rfl 0 rfs 0.0 0 dia 1 rfs 0.0 0 rfs rfl 0 dia 1 drs1 -dr1 0 drs1 0.0 0 dia 1 drs1 0.0 0 drs1 dr1 0 dia 1 drs2 -dr2 0 drs2 0.0 0 dia 1 drs2 0.0 0 drs2 dr2 0 dia 1 drs3 -dr3 0 drs3 0.0 0 dia 1 drs3 0.0 0 drs3 dr3 0 dia 1 drs4 -dr4 0 drs4 0.0 0 dia 1 drs4 0.0 0 drs4 dr4 0 dia 1 source Wire 1, center This antenna started from the stock Stellar Labs 4el el FM Antenna. Two (2) dir elements were added and the boom streched to 8' 9". The AO analysis shows; 10.6 db F/G 13.2 db F/B 300 ohm feed impedance- swr due to match; 308 - j 1 SWR = 1.03:1 To receive any FM station from Mid-FM-Band @ 98.0 Mhz The antenna has a 300 to 75 stripline transformer built into the feed point making the transmission line (RG-6) a better way to send the signal to my FM tuner. Add three (3) ferrite line chokes (apx 1100 ohms) at the feed point to further attenuate the common mode signal. For FM dx, the F/G is the most important parameter with feed impedance being a close second!