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holl_ands | Home > Multi-Bay Bowtie Antennas > UHF 4-Bay Bowties with Reflector > Browse:Ch22 FF4 4-Bay Bowtie + DARNEW UHF Free-Form 4-Bay + FlatScreenReflUHF Free-Form 4-Bay + DblAnglReflUHF FF4 SingleAngleRefl - DeepSidelobesUHF M4 (10x9.5) Super-4-Bay+DARUHF M4 (9.5x9.0)+DAR Flat vs Swept BowsM4 (9.5x9.0)+DAR Flat v Swept BowsM4 (9.5x9) + Various FLAT Refl. WidthsM4 (9.5x9.0) + 40x34 FLAT Refl at 5-inUHF M4 (9.5x9.0) 4-Bay+FLAT Grid at 5.5"UHF M4 (9.5x9.0) 4-Bay+FLAT Grid at 16"M4 (9.5x9) + Various Number of RRs - OPTUHF KosmicSuperQuad+DAR FlatvsSwept BowsUHF Actual CM4221 Flat Bows & ReflectorUHF CM4221a.ez.nec Flat Bows & ReflectorUHF CM4221HD (Hacked) - 16 ReflRodsUHF CM-4221HD - 10-in WhiskersUHF CM4221HD (Hacked) + Director RodsCM4221HD (Hacked) + Stub FilterAntennacraft U-4000 - 9 Reflector RodsA-D Old DB-4 4-Bay Bowtie with Reflector
UHF M4 (9.5x9.0)+DAR Flat vs Swept Bows mclapp M4 Super-4-Bay (9.5x9.0) with FLAT vs SWEPT Bowties and Double Angled Reflector analyzed to determine Optimum Forward Sweep (BowSwp=2.0-in), presuming all dimensions per mclapp's posted drawings, as optimized for New UHF Band (Ch14-51), using 1/8-in = AWG8 elements and AWG12 feedlines: http://m4antenna.eastmasonvilleweather.com/index.html Website re DIY Construction:  https://sites.google.com/site/maycreates/ota-setup/mclapp-4 UHF Raw Gain = 13.3 to 15.8 dBi, F/B & F/R Min = 19.3 dB [EXCL] and SWR (300-ohms) under 2.8. Hi-VHF Raw Gain = 8.3 to 8.6 dBi, F/B & F/R Ratio = 18 to 22 dB [GOOD-EXCL] and SWR (300-ohms) = 4 to 15 [EXCESSIVE]. BowLength = 9.5-in (AWG8), Inner-Inner Bowtie Spacing = 9.0-in, Inner-Outer Bowtie Spacing = 9.0, Tine Separation = 5.5-in.  Feedline Separation = 1.25-in (AWG12), with 1.0-in at Crossover. Center of Crossover 3.125-in from Center of Outer Bowties. Double Angled Screen Reflector, 16-Gauge, 40"Hx36"W, with outer 10-in bent forward 2.5-in, Grid = 1"H x 2"W. Separation of Reflector from Bowties=4.5-in (at centerline). Gain and SWR are Good for entire New UHF Band, with only moderate reduction for Old Band (Ch52-69). Hi-VHF Ch7-13 has only moderate Net Gain loss due to increasing SWR on Ch9-13. Date(s): 18 Mar 2010. Album by holl_ands. 1 - 33 of 33 Total. 6014 Visits.
enlarge 162KB, 665x1024 1 M4 4-Bay (9.5x9.0) with SWEPT Bowties - 3D View enlarge 339KB, 914x1024 2 M4 4-Bay (9.5x9.0) with SWEPT Bowties - Front View [1 small box = 1.0 inch] enlarge 98KB, 308x1024 3 M4 4-Bay (9.5x9.0) with SWEPT Bowties - Side View [1 small box = 1.0 inch] enlarge 82KB, 368x1024 4 M4 4-Bay (9.5x9.0) with SWEPT Bowties - Top View [1 small box = 1.0 inch] enlarge 144KB, 791x1024 5 M4 4-Bay (9.5x9.0) with SWEPT Bowties 4nec2 File enlarge 72KB, 1024x768 6 Swept Bowtie Coordinate Derivation enlarge 291KB, 1024x696 7 COMPARISONS - UHF Raw and Net Gain: CM4228 w Combiner Mod, CM4228a Nist File, mclapp M4 4-Bay (9.5x9.0) w 2" BowSwp & DblAnglRefl, Kosmic SuperQuad (9.75x9.5 w 2" BowSwp & SnglAnglRefl. enlarge 223KB, 1024x696 8 M4 4-Bay (9.5x9.0) FLAT vs SWEPT Bowties Per Drawings: UHF Raw and Net Gain enlarge 222KB, 1024x689 9 M4 4-Bay (9.5x9.0) FLAT vs SWEPT Bowties If ALL AWG10: UHF Raw and Net Gain enlarge 264KB, 1024x696 10 COMPARISONS - UHF F/R & F/B Ratios: CM4228 w Combiner Mod, CM4228a Nist File, mclapp M4 4-Bay (9.5x9.0) w 2" BowSwp & DblAnglRefl, Kosmic SuperQuad (9.75x9.5 w 2" BowSwp & SnglAnglRefl. enlarge 219KB, 1024x696 11 M4 4-Bay (9.5x9.0) FLAT vs SWEPT Bowties Per Drawings: UHF F/R and F/B Ratios enlarge 221KB, 1024x696 12 M4 4-Bay (9.5x9.0) FLAT vs SWEPT Bowties If ALL AWG10: UHF F/R and F/B Ratios enlarge 146KB, 1024x648 13 M4 4-Bay (9.5x9.0) with SWEPT Bowties UHF Raw Gain = 13.7 to 15.5 dBi for BowSwp=2.0-in enlarge 175KB, 1024x648 14 M4 4-Bay (9.5x9.0) with SWEPT Bowties UHF SWR (300-ohms)under 2.7 for BowSwp=2.0-in enlarge 142KB, 1024x648 15 M4 4-Bay (9.5x9.0) with SWEPT Bowties UHF Impedance for BowSwp=2.0-in enlarge 304KB, 1024x1024 16 M4 4-Bay (9.5x9.0) with SWEPT Bowties UHF Pattern at 470 MHz: BowSwp=2.0-in enlarge 304KB, 1024x1024 17 M4 4-Bay (9.5x9.0) with SWEPT Bowties UHF Pattern at 542 MHz: BowSwp=2.0-in enlarge 303KB, 1024x1024 18 M4 4-Bay (9.5x9.0) with SWEPT Bowties UHF Pattern at 602 MHz: BowSwp=2.0-in enlarge 246KB, 1024x1024 19 M4 4-Bay (9.5x9.0) with SWEPT Bowties UHF Pattern at 698 MHz: BowSwp=0.0-in enlarge 244KB, 1024x1024 20 M4 4-Bay (9.5x9.0) with SWEPT Bowties UHF Pattern at 758 MHz: BowSwp=0.0-in enlarge 244KB, 1024x1024 21 M4 4-Bay (9.5x9.0) with SWEPT Bowties UHF Pattern at 806 MHz: BowSwp=0.0-in enlarge 137KB, 1024x648 22 M4 4-Bay (9.5x9.0) with SWEPT Bowties Hi-VHF Raw Gain and F/R Ratio: BowSwp=2.0-in enlarge 170KB, 1024x648 23 M4 4-Bay (9.5x9.0) with SWEPT Bowties Hi-VHF SWR (300-ohm): BowSwp=2.0-in enlarge 142KB, 1024x648 24 M4 4-Bay (9.5x9.0) with SWEPT Bowties Hi-VHF Impedance: BowSwp=2.0-in enlarge 309KB, 1024x1024 25 M4 4-Bay (9.5x9.0) with SWEPT Bowties Hi-VHF Pattern at 174 MHz: BowSwp=2.0-in enlarge 310KB, 1024x1024 26 M4 4-Bay (9.5x9.0) with SWEPT Bowties Hi-VHF Pattern at 198 MHz: BowSwp=2.0-in enlarge 313KB, 1024x1024 27 M4 4-Bay (9.5x9.0) with SWEPT Bowties Hi-VHF Pattern at 216 MHz: BowSwp=2.0-in enlarge 132KB, 1024x648 28 M4 4-Bay (9.5x9.0) with SWEPT Bowties Ch2-FM Band Raw Gain and F/R Ratio: BowSwp=2.0-in enlarge 165KB, 1024x648 29 M4 4-Bay (9.5x9.0) with SWEPT Bowties Ch2-FM Band SWR (300-ohms): BowSwp=2.0-in enlarge 137KB, 1024x648 30 M4 4-Bay (9.5x9.0) with SWEPT Bowties Ch2-FM Band Impedance: BowSwp=2.0-in enlarge 306KB, 1024x1024 31 M4 4-Bay (9.5x9.0) with SWEPT Bowties Ch2 Azimuthal Pattern: BowSwp=2.0-in enlarge 306KB, 1024x1024 32 M4 4-Bay (9.5x9.0) with SWEPT Bowties Ch5 Azimuthal Pattern: BowSwp=2.0-in enlarge 310KB, 1024x1024 33 M4 4-Bay (9.5x9.0) with SWEPT Bowties FM Band Azimuthal Pattern: BowSwp=2.0-in
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