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Public Gallery>holl_ands>Animals and Pets>Browse:Midkiff's Bob TooTAYLOR/CANYON LITTER 6 WEEKSMercuryRat Race Madame MustacheRat Race Amazing JoyYorkie"PR" Wudnshu's Sweet Georgia BrownUKC GRCH Cal Val IB A Red Chilli PepperYorkie/ Chihuahua Mixyorkie / Pomeranian Mix"Nani""Pudge""Stich""Lelo"Litter 7-9-14UHF 3-Bay Dipole + 12RR - OPTTAYLOR/CANYON LITTER 5 WKS OLD SNAPSHOTSLitter 7-1-14Hermanita CalienteOur Service DogsWicked Strong"Duwara"TAYLOR/CANYON LITTER 4 WEEKS OLDBadArenTAYLOR/CANYON LITTER 3 WEEK SNAPSHOTSUKC Ch."PR" Kalon's Wudnshu StarmanUKC Ch "PR" Wudnshu Your So VainFinnLitter born 6-16-14

UHF 3-Bay Fat Dipole + 12RR - OPT Slideshow UHF 3-Bay Fat Dipole with 12 Reflector Rods analyzed using 4nec2 after determining dimensions using nikiml's Python Optimization Scripts.  Reflector Rod-to-Rod Separation was presumed to be 2-in for an existing set of 3 ea Reflector Sub-Assemblies with 4RR each. UHF Raw Gain = 10.9 to 12.5 dBi, F/B & F/R Ratio Min = 17.7 dB and SWR (300-ohms) under 2.7. Hi-VHF Raw Gain Forward is low but usable on Ch7-9 & Ch13, but toward REAR is higher on Ch10-12. Hi-VHF SWR (300-ohms) is Excessive. ASSUMED DIMENSIONS (all in inches): Rdip=0.4375 = Radius of Dipole Elements (7/8-in O.D. in this model) Rfeed=0.06425 = Radius of Feedline (AWG8 in this model) DSwp=0 = Dipole Forward Sweep [If any, zero in this model] Hop=1.0 = Separation at Crossovers RR=2.0 = Reflector Rod-to-Rod Separation Rrod=0.1875 = Radius of Reflector Rods OPTIMIZED DIMENSIONS (rounded to nearest 1/8-in): DDSep=10.25 = Dipole-To-Dipole Separation DLen=5.875 = Dipole Half-Length [Excludes Feedline Gap] FeedSep=3.375 = Separation between FEEDLINE wires ZCross=1.75 = From Center of Feedline Cross-Over to Center of OUTER Dipoles RS=4.5 = Reflector Rod Separation behind Hourglass YRod=13.5 = Reflector Rod Half-Lengths ERRATA (21Aug2014): Uploaded Corrected 4nec2 File, which had "16RR" rather than "12RR" in Comments. 20 Aug 20141 - 24 of 24 Images6583 visitsAlbum by holl_ands

enlarge 84KB, 577x1024 UHF 3-Bay Dipole + 12RR - OPT 3D View enlarge 287KB, 1024x900 UHF 3-Bay Dipole + 12RR - OPT Front View [1 large square = 2.5 inches] enlarge 104KB, 365x1024 UHF 3-Bay Dipole + 12RR - OPT Top View [1 large square = 2.5 inches] enlarge 177KB, 1024x690 UHF 3-Bay Dipole + 12RR - OPT UHF Raw Gain = 10.9 to 12.5 dBi UHF F/B & F/R Ratio Minimum = 17.7 dB enlarge 177KB, 1024x690 UHF 3-Bay Dipole + 12RR - OPT UHF SWR (300-ohms) Under 2.7 enlarge 216KB, 1024x690 UHF 3-Bay Dipole + 12RR - OPT UHF Impedance enlarge 300KB, 1024x1024 UHF 3-Bay Dipole + 12RR - OPT Azimuthal Pattern at 470 MHz enlarge 301KB, 1024x1024 UHF 3-Bay Dipole + 12RR - OPT Azimuthal Pattern at 530 MHz enlarge 301KB, 1024x1024 UHF 3-Bay Dipole + 12RR - OPT Azimuthal Pattern at 590 MHz enlarge 301KB, 1024x1024 UHF 3-Bay Dipole + 12RR - OPT Azimuthal Pattern at 650 MHz enlarge 301KB, 1024x1024 UHF 3-Bay Dipole + 12RR - OPT Azimuthal Pattern at 698 MHz enlarge 300KB, 1024x1024 UHF 3-Bay Dipole + 12RR - OPT Azimuthal Pattern at 798 MHz enlarge 308KB, 1024x1024 UHF 3-Bay Dipole + 12RR - OPT Azimuthal Pattern at 806 MHz enlarge 34KB, 791x1024 UHF 3-Bay Dipole + 12RR - OPT 4nec2 File enlarge 118KB, 420x1024 UHF 3-Bay Dipole + 12RR - OPT Side View [1 large square = 2.5 inches] enlarge 175KB, 1024x690 UHF 3-Bay Dipole + 12RR - OPT Hi-VHF Gain is 6-4 dBi on Ch7-9 and 8 dBi on Ch13, with more to REAR on Ch10-12 enlarge 202KB, 1024x690 UHF Raw Gain = 10.9 to 12.5 dBi Hi-VHF SWR (300-ohms) is Excessive enlarge 222KB, 1024x690 UHF Raw Gain = 10.9 to 12.5 dBi Hi-VHF Impedance enlarge 302KB, 1024x1024 UHF 3-Bay Dipole + 12RR - OPT Azimuthal Pattern at 174 MHz enlarge 303KB, 1024x1024 UHF 3-Bay Dipole + 12RR - OPT Azimuthal Pattern at 192 MHz enlarge 304KB, 1024x1024 UHF 3-Bay Dipole + 12RR - OPT Azimuthal Pattern at 198 MHz enlarge 306KB, 1024x1024 UHF 3-Bay Dipole + 12RR - OPT Azimuthal Pattern at 207 MHz enlarge 302KB, 1024x1024 UHF 3-Bay Dipole + 12RR - OPT Azimuthal Pattern at 210 MHz enlarge 302KB, 1024x1024 UHF 3-Bay Dipole + 12RR - OPT Azimuthal Pattern at 216 MHz