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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 CM4221HD (Hacked) + Director Rods UHF CM-4221HD 4-Bay Bowtie with Flat Reflector Screen (As Delivered), with Balun Reversal Hack, analyzed using 4nec2 after ADDING 1, 2, 3 and then 4 Director Rods in front of each Bowtie, Optimizing DirRod Lengths and X-Axis placements using nikiml's Python Scripts. This exercise illustrates the FUTILITY of adding Yagi type Director Rods to Multiple Bowtie type antennas to improve Raw Gain.  A larger Reflector should increase Raw Gain, F/R & F/B Ratios. Date(s): 17 Jul 2013. Album by holl_ands. 1 - 18 of 18 Total. 4482 Visits.
enlarge 190KB, 1024x696 1 UHF CM4221HD (Hacked) + Director Rods UHF Raw Gain Comparison enlarge 252KB, 1024x696 2 UHF CM4221HD (Hacked) + Director Rods UHF Raw Gain & F/R Ratio Comparison enlarge 147KB, 1024x696 3 UHF CM4221HD (Hacked) + Director Rods UHF SWR (300-ohms) Comparison enlarge 131KB, 662x1024 4 UHF CM4221HD (Hacked) + 4 DirRods 3D View enlarge 171KB, 654x1024 5 UHF CM4221HD (Hacked) + 4 DirRods Top View [1 large square = 2.5 inches] enlarge 169KB, 562x1024 6 UHF CM4221HD (Hacked) + 4 DirRods Side View [1 large square = 2.5 inches] enlarge 130KB, 481x1024 7 UHF CM4221HD (Hacked) + 8 DirRods 3D View enlarge 109KB, 399x1024 8 UHF CM4221HD (Hacked) + 8 DirRods Top View [1 large square = 2.5 inches] enlarge 107KB, 335x1024 9 UHF CM4221HD (Hacked) + 8 DirRods Side View [1 large square = 2.5 inches] enlarge 152KB, 924x1024 10 UHF CM4221HD (Hacked) + 12 DirRods 3D View enlarge 208KB, 990x1024 11 UHF CM4221HD (Hacked) + 12 DirRods Top View [1 large square = 5 inches] enlarge 213KB, 959x1024 12 UHF CM4221HD (Hacked) + 12 DirRods Side View [1 large square = 5 inches] enlarge 112KB, 850x1024 13 UHF CM4221HD (Hacked) + 16 DirRods 3D View enlarge 258KB, 1024x975 14 UHF CM4221HD (Hacked) + 16 DirRods Top View [1 large square = 2.5 inches] enlarge 272KB, 917x1024 15 UHF CM4221HD (Hacked) + 16 DirRods Side View [1 large square = 2.5 inches] enlarge 44KB, 791x1024 16 UHF CM4221HD (Hacked) + 8 DirRods 4nec2 File [Comment out SYmbols & GW Cards for fewer DirRods.] enlarge 44KB, 791x1024 17 UHF CM4221HD (Hacked) + 16 DirRods 4nec2 File [Comment out SYmbols & GW Cards for fewer DirRods.] enlarge 22KB, 791x1024 18 UHF CM4221HD (Hacked) + 16 DirRods Contents of Python Control *.bat text File [Change filename for fewer DirRods.]
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