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holl_ands | Home > Multi-Bay Bowtie Antennas > Browse:UHF Multi-Bay Comparison ChartsUHF 2-Bay Bowties - NO Reflectors/UHF 2-Bay Bowties with Reflector/UHF 2-Bay SOLID Triangles - Var RR'sUHF 3-Bay Bowties - NO Reflectors/UHF 4-Bay Bowties - NO Reflectors/UHF 4-Bay Bowties with Reflector/UHF H4 2x2-Bay Bowties/HiVHF+UHF HUM4 (9.5x9) + 2Sizes ReflRodsNEW UHF FF6 No Refl - OPTNEW UHF Free-Form 6-Bay (NU-FF6) + VDARUHF FF6 Vertical 6-Bay Bowtie - NO ReflUHF Vertical 6-Bay Bowtie (FF6) + VDARUHF 8-Bay Bowties - If NO Reflectors/UHF 8-Bay Bowtie with Reflector/Hi-VHF 2-Bay Bowtie - NO ReflectorHiVHF 2-Bay - Various Reflector RodsHi-VHF 2-Bay Bowtie - FLAT Grid Refl.Hi-VHF FF4 4-Bay Bowtie - NO ReflectorHi-VHF 4-Bay Bowtie - NO ReflectorHi-VHF 4-Bay Bowtie with Reflector
Hi-VHF 4-Bay Bowtie with Reflector Hi-VHF 4-Bay Bowties with 15 and 25 Reflector Rods analyzed using 4nec2. Whisker Length = 31-in (QICT) , Bowtie Separation = 32-in, Tine Separation = 17-in. Feedline Separation = 1.5-in (QICT), Crossover = 5-in from Outer Bowties. 15 (or 25) Reflector Rods (QICT) with 10-in (or 5-in) Separation, Width = 40-in, Total Height = 60-in. Distance from Reflector Rods to Bowties = 15-in. QICT = Quarter Inch Copper Tubing (or 3/8-in Aluminum Tubing), smaller diameter increases SWR a bit, with AWG8 preferred over AWG10.  Could also use RG-6/58/59 Coax (for Hi-VHF, no need to strip insulation). Size (with 15-Reflector Rods) was optimized for max Gain=15.5 dBi on Ch13, 13.1 dBi Gain on Ch7 and SWR under 2.0. Size (with 25-Reflector Rods) was optimized for max Gain=15.9 dBi on Ch13, 13.6 dBi Gain on Ch7 and SWR under  2.3. A slightly larger size (1 to 2-in more) would improve Ch7 with some Gain reduction on Ch13. Album by holl_ands. 1 - 28 of 28 Total. 15884 Visits.
enlarge 127KB, 636x1024 1 Hi-VHF 4-Bay Bowtie - 15 Reflector Rods 3D View enlarge 232KB, 750x1024 2 Hi-VHF 4-Bay Bowtie - 15 Reflector Rods Front View [1 Big Box = 12.5-inches] enlarge 336KB, 1024x966 3 Hi-VHF 4-Bay Bowtie - 15 Reflector Rods Front View CROSSOVER DETAIL [1 Big Box = 2.5-inches] enlarge 152KB, 1024x686 4 Hi-VHF 4-Bay Bowtie - 15 Reflector Rods Hi-VHF Raw Gain = 13.1 dBi on Ch7, rising to 15.5 dBi on Ch13. enlarge 178KB, 1024x686 5 Hi-VHF 4-Bay Bowtie - 15 Reflector Rods Hi-VHF SWR Under 2.0 enlarge 142KB, 1024x686 6 Hi-VHF 4-Bay Bowtie - 15 Reflector Rods VHF Impedance enlarge 300KB, 1024x1024 7 Hi-VHF 4-Bay Bowtie - 15 Reflector Rods Azimuthal Pattern at 174 MHz enlarge 301KB, 1024x1024 8 Hi-VHF 4-Bay Bowtie - 15 Reflector Rods Azimuthal Pattern at 186 MHz enlarge 301KB, 1024x1024 9 Hi-VHF 4-Bay Bowtie - 15 Reflector Rods Azimuthal Pattern at 198 MHz enlarge 302KB, 1024x1024 10 Hi-VHF 4-Bay Bowtie - 15 Reflector Rods Azimuthal Pattern at 207 MHz enlarge 301KB, 1024x1024 11 Hi-VHF 4-Bay Bowtie - 15 Reflector Rods Azimuthal Pattern at 216 MHz enlarge 36KB, 791x1024 12 Hi-VHF 4-Bay Bowtie - 15 Reflector Rods 4nec2 File enlarge 75KB, 254x1024 13 Hi-VHF 4-Bay Bowtie - 15 Reflector Rods Side View [1 Big Box = 12.5-inches] enlarge 77KB, 360x1024 14 Hi-VHF 4-Bay Bowtie - 15 Reflector Rods Top View [1 Big Box = 12.5-inches] enlarge 36KB, 791x1024 15 Hi-VHF 4-Bay Bowtie - 25 Reflector Rods 4nec2 File enlarge 173KB, 607x1024 16 Hi-VHF 4-Bay Bowtie - 25 Reflector Rods 3D View enlarge 240KB, 752x1024 17 Hi-VHF 4-Bay Bowtie - 25 Reflector Rods Front View [1 Big Box = 12.5-inches] enlarge 339KB, 1024x966 18 Hi-VHF 4-Bay Bowtie - 25 Reflector Rods Front View - CROSSOVER DETAIL [1 Big Box = 2.5-inches] enlarge 155KB, 1024x686 19 Hi-VHF 4-Bay Bowtie - 25 Reflector Rods Hi-VHF Raw Gain = 13.6 dBi on Ch7, rising to 15.9 dBi on Ch13. enlarge 169KB, 1024x686 20 Hi-VHF 4-Bay Bowtie - 25 Reflector Rods Hi-VHF SWR (300-ohms) Under 2.3 enlarge 143KB, 1024x686 21 Hi-VHF 4-Bay Bowtie - 25 Reflector Rods Hi-VHF Impedance enlarge 301KB, 1024x1024 22 Hi-VHF 4-Bay Bowtie - 25 Reflector Rods Azimuthal Pattern at 174 MHz enlarge 302KB, 1024x1024 23 Hi-VHF 4-Bay Bowtie - 25 Reflector Rods Azimuthal Pattern at 186 MHz enlarge 302KB, 1024x1024 24 Hi-VHF 4-Bay Bowtie - 25 Reflector Rods Azimuthal Pattern at 198 MHz enlarge 304KB, 1024x1024 25 Hi-VHF 4-Bay Bowtie - 25 Reflector Rods Azimuthal Pattern at 207 MHz enlarge 304KB, 1024x1024 26 Hi-VHF 4-Bay Bowtie - 25 Reflector Rods Azimuthal Pattern at 216 MHz enlarge 76KB, 246x1024 27 Hi-VHF 4-Bay Bowtie - 25 Reflector Rods Side View [1 Big Box = 12.5-inches] enlarge 78KB, 355x1024 28 Hi-VHF 4-Bay Bowtie - 25 Reflector Rods Top View [1 Big Box = 12.5-inches]
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