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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
A-D Old DB-4 4-Bay Bowtie with Reflector Antennas Direct (Old ) DB-4 4-Bay Bowtie with Reflector analyzed using 4nec2. Dimensions per mclapp's 4nec2 file with holl_ands modifications to adjust AGT=1 and various FR & RP statements: http://www.frontiernet.net/~mclapp/Antennas/Computer%20Models/ Whisker Length=6.17-in, BowInner-Inner=7.85-in, BowInner-Outer=7.9-in, Tine Separation=1.2-in, Feedline Separation=1.8-in, Hop=1.0-in.  Two Reflectors: 12.7"x18.9" at Reflector-to-Bowtie Separation=4-in. Raw Gain falls off on lowest frequencies.  High SWR on low and mid frequencies. NOTE: d510d180's parameterized 4nec2 model for the DB-4 can be found here (using variable SYmbols): http://www.avsforum.com/avs-vb/showthread.php?p=15782728 Date(s): 11 Dec 2011. Album by holl_ands. 1 - 20 of 20 Total. 5234 Visits.
enlarge 162KB, 720x1024 1 A-D DB-4 4-Bay Bowtie with Reflector 3D View enlarge 309KB, 847x1024 2 A-D DB-4 4-Bay Bowtie with Reflector Front View [1 big box = 2.5-inches] enlarge 92KB, 328x1024 3 A-D DB-4 4-Bay Bowtie with Reflector Side View [1 big box = 2.5-inches] enlarge 152KB, 1152x584 4 A-D DB-4 4-Bay Bowtie with Reflector UHF Raw Gain - Falls off on low frequencies enlarge 175KB, 1152x584 5 A-D DB-4 4-Bay Bowtie with Reflector UHF SWR (300-ohms) is High in low-mid band. enlarge 155KB, 1152x584 6 A-D DB-4 4-Bay Bowtie with Reflector UHF Impedance enlarge 300KB, 1024x1024 7 A-D DB-4 4-Bay Bowtie with Reflector Azimuthal Pattern at 470 MHz enlarge 305KB, 1024x1024 8 A-D DB-4 4-Bay Bowtie with Reflector Azimuthal Pattern at 590 MHz enlarge 307KB, 1024x1024 9 A-D DB-4 4-Bay Bowtie with Reflector Azimuthal Pattern at 698 MHz enlarge 306KB, 1024x1024 10 A-D DB-4 4-Bay Bowtie with Reflector Azimuthal Pattern at 758 MHz enlarge 310KB, 1024x1024 11 A-D DB-4 4-Bay Bowtie with Reflector Azimuthal Pattern at 806 MHz enlarge 95KB, 419x1024 12 A-D DB-4 4-Bay Bowtie with Reflector Top View [1 big box = 2.5-inches] enlarge 131KB, 1024x648 13 A-D DB-4 4-Bay Bowtie with Reflector Hi-VHF Raw Gain Higher towards the REAR enlarge 174KB, 1024x648 14 A-D DB-4 4-Bay Bowtie with Reflector Hi-VHF SWR (300-ohms) is Excessive enlarge 129KB, 1024x648 15 A-D DB-4 4-Bay Bowtie with Reflector Hi-VHF Impedance enlarge 300KB, 1024x1024 16 A-D DB-4 4-Bay Bowtie with Reflector Azimuthal Pattern at 174 MHz enlarge 301KB, 1024x1024 17 A-D DB-4 4-Bay Bowtie with Reflector Azimuthal Pattern at 183 MHz enlarge 301KB, 1024x1024 18 A-D DB-4 4-Bay Bowtie with Reflector Azimuthal Pattern at 195 MHz enlarge 305KB, 1024x1024 19 A-D DB-4 4-Bay Bowtie with Reflector Azimuthal Pattern at 216 MHz enlarge 74KB, 791x1024 20 A-D DB-4 4-Bay Bowtie with Reflector 4nec2 File
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