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holl_ands | Home > Yagi Antennas > Browse:Yagi Comparison ChartsUHF 2-El FD-Yagi - OPTimizedUHF 3-El FD-Yagi - OPTimized UHF 4-El FD-Yagi - OPTimizedUHF 5-El FD-Yagi - OPTimized UHF 5-El FLAT Yagi - CM-4040UHF 6-El FD-Yagi - OPTimizedUHF 6-El Asymmetric Dipole Yagi - WA5VJBUHF 7-El FD-Yagi - OPTimizedUHF 7-El FD-Yagi - Opt. by NikimlUHF 8-El FD-Yagi (2ReflRods) - OPTimizedUHF 8-El FLF-Yagi - 300ohm OPTimizedUHF 12-El FD-Yagi - OPTimizedUHF 13-El FD-Yagi (2ReflRod) - OPTimizedUHF 13-El FD-Yagi (2RR) EqualDirs - OPTUHF 13-El FD-Yagi (2ReflRods) - kgbUHF CM4248 15El FD-Yagi + 14RR CornerUHF 16-El Yagi + 6RR Corner Wade CYD1446UHF 17-El Yagi with 6RR's - tfrlicUHF 18-El FD-Yagi (2ReflRods) - OPTUHF 18-El Yagi from snowman53UHF 25-El FD-Yagi (2ReflRods) - OPTUHF 91XG Corner-FD-YagiUHF 91XG - Wider Corner ReflectorUHF 91XG - Wider Bowties, Better Ch14-51UHF 91XG - Taller Corner ReflectorCh14-17 15El FD-Yagi + 14RR Corner - OPTCh14-17 18El FD-Yagi + 10RR Corner - OPTCh14-17 18El FD-Yagi + 14RR Corner - OPTCh14-17 18El FD-Yagi + 20RR Corner - OPTCh14-19 18El FD-Yagi + 20RR Corner - OPTCh14-19 21El FD-Yagi + 20RR Corner - OPTCh22 9-El FD-Yagi - 300ohm OPTimizedCh22 9-El FLF-Yagi - 300ohm OPTimizedCh22 9-El FD-Yagi - 75ohm MTM ScientificCh22 9-El FD-Yagi - 300ohm K7MEMCh22 11-El FD-Yagi - 300ohm K7MEMCh30 18El FD-Yagi + 14RR CornerCh45-51 12-El FD-Yagi - OPTimizedHi-VHF 3-El FD-Yagi - OPTimizedHi-VHF 3-El One-Lamda LFA-YagiHi-VHF 4-El FD-Yagi - OPTimizedHi-VHF 4-El FLF Yagi - OPTimizedHi-VHF 4-El K7MEM Yagi: Folded vs NotHi-VHF 5-El FD-Yagi - OPTimizedHi-VHF 5-El FLF Yagi - OPTimizedHi-VHF 5-El Yagi Optimized by K6STIHi-VHF 6-El FD-Yagi - OPTimizedHi-VHF 7-El FD-Yagi - OPTimizedHi-VHF 8-El K7MEM Yagi: Folded vs NotHi-VHF 8-El FD-Yagi - OPTimizedHiVHF 9-El FD-Yagi - 1 vs 3 Refl. RodsHiVHF 9-El FD-Yagi, Stellar Labs 30-2475Hi-VHF 10-El FD-Yagi - OPTimizedHi-VHF 10-El FD-Yagi - Lorkoe's AntiqueHi-VHF 12-El FD-Yagi - OPTimizedHi-VHF 12-El FD-Yagi (3ReflRods) - kgbHiVHF 13El FD-Yagi - Stellar Labs 302476Hi-VHF 13-El FD-Yagi (2ReflRods) - kgbHi-VHF 16-El FD-Yagi - OPTimizedHi-VHF 18-El FD-Yagi - OPTimizedHi-VHF 20-El FD-Yagi - OPTimizedHi-VHF 22-El FD-Yagi - OPTimizedCh13 5-El Yagi - OPTimized by nikimlCh13 8-El Yagi - OPTimized by K6STICh13 12-El FD-Yagi - OPTimizedCh12 12-El FD-Yagi - OPTimized Ch6 2-El FD-Yagi - OPTimizedCh6 3-El FD-Yagi - OPTimizedCh7 12-El Yagi from v37bqhCh2-6 Antennacraft Y5-2-6 5-El FD-YagiCh3 4-El FD-Yagi - OPTimizedCh3 5-El FD-Yagi - OPTimizedCh3 6-El FD-Yagi - OPTimized
UHF 16-El Yagi + 6RR Corner Wade CYD1446 UHF 16-Element Yagi with 6 Reflector Rod Corner Reflector, approximate 4nec2 Model for Wade CYD-1446, analyzed using 4nec2 Antenna Modeling Program.  Dimensions were provided by Choclab, with some of his photos below. Two versions are presented below, one without and one WITH the Open Matching Stub Line found directly behind the Active Dipole Element.  There was no significant difference between the two models. Results are probably "typical" for it's era [esp. given CONSTRAINTS that ALL Director Lengths and Spacings are the SAME], but are rather underwhelming compared to more modern OPTIMIZED Yagi's, with Loss of Gain on Upper Channels [which usually need the MOST Gain], poor F/B & F/R Ratios on Upper Channels and Excessive SWR on both Lower and Upper Channels. ============================================================= Note that a simplified ALL TUBULAR 4nec2 Model was used for this APPROXIMATE Analysis, using NEC2 Engine [instead of more accurate NEC4 Engine to Model the Rectangular Directors]. And rather than TRYING to use limited NEC2 Engine to Model all Surfaces in the Open Matching Stub, an Idealized Open Transmission Line (TL Statement) was used instead to find the OPTIMUM Length and Characteristic Impedance. Date(s): 8 Jan 2017. Album by holl_ands. 1 - 54 of 54 Total. 2492 Visits.
enlarge 57KB, 1024x677 1 UHF 16-El Yagi + 6RR Corner Wade CYD1446 3D View - Without Open Matching Stub enlarge 293KB, 976x1024 2 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Front View - Without Open Matching Stub [1 Large Square = 5 cm] enlarge 193KB, 1152x600 3 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Side View - Without Open Matching Stub [1 Large Square = 125 cm] enlarge 162KB, 1152x459 4 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Top View - Without Open Matching Stub [1 Large Square = 125 cm] enlarge 32KB, 791x1024 5 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub 4nec2 *.doc Results Summary File enlarge 46KB, 791x1024 6 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub EVAL *.html Results Summary File enlarge 213KB, 1152x701 7 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub Raw Gain = 12.2 to 15.1 to 8.5 to 9.7 dBi F/B and F/R Ratios Decrease on Higher Freqs enlarge 231KB, 1152x711 8 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub SWR (300-ohms) Under 3.7 enlarge 271KB, 1152x701 9 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub UHF Impedance Increases with Frequency enlarge 298KB, 1024x1024 10 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub Azimuthal Pattern at 470 MHz enlarge 299KB, 1024x1024 11 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub Azimuthal Pattern at 530 MHz enlarge 299KB, 1024x1024 12 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub Azimuthal Pattern at 590 MHz enlarge 308KB, 1024x1024 13 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub Azimuthal Pattern at 650 MHz enlarge 303KB, 1024x1024 14 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub Azimuthal Pattern at 668 MHz enlarge 290KB, 1024x1024 15 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub Azimuthal Pattern at 698 MHz enlarge 296KB, 1024x1024 16 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub Elevation Pattern at 470 MHz enlarge 298KB, 1024x1024 17 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub Elevation Pattern at 530 MHz enlarge 300KB, 1024x1024 18 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub Elevation Pattern at 590 MHz enlarge 301KB, 1024x1024 19 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub Elevation Pattern at 650 MHz enlarge 303KB, 1024x1024 20 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub Elevation Pattern at 668 MHz enlarge 293KB, 1024x1024 21 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Without Open Matching Stub Elevation Pattern at 698 MHz enlarge 57KB, 1152x641 22 UHF 16-El Yagi + 6RR Corner Wade CYD1446 3D View - With Open Matching Stub enlarge 290KB, 970x1024 23 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Side View - With Open Matching Stub [1 Large Square = 5 cm] enlarge 203KB, 1152x617 24 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Side View - With Open Matching Stub [1 Large Square = 125 cm] enlarge 168KB, 1152x467 25 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Top View - Without Open Matching Stub [1 Large Square = 125 cm] enlarge 33KB, 791x1024 26 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub 4nec2 *.doc File enlarge 47KB, 791x1024 27 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub EVAL *.html Results Summary File enlarge 199KB, 1152x711 28 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub Raw Gain = 12.2 to 15.1 to 8.5 to 9.7 dBi F/B and F/R Ratios Decrease on Higher Freqs enlarge 228KB, 1152x711 29 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub SWR (300-ohms) Under 3.9 enlarge 279KB, 1152x711 30 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub UHF Impedance Increases with Frequency enlarge 313KB, 1024x1024 31 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub Azimuthal Pattern at 470 MHz enlarge 318KB, 1024x1024 32 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub Azimuthal Pattern at 530 MHz enlarge 319KB, 1024x1024 33 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub Azimuthal Pattern at 590 MHz enlarge 328KB, 1024x1024 34 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub Azimuthal Pattern at 650 MHz enlarge 322KB, 1024x1024 35 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub Azimuthal Pattern at 668 MHz enlarge 322KB, 1024x1024 36 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub Azimuthal Pattern at 698 MHz enlarge 312KB, 1024x1024 37 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub Elevation Pattern at 470 MHz enlarge 318KB, 1024x1024 38 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub Elevation Pattern at 530 MHz enlarge 324KB, 1024x1024 39 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub Elevation Pattern at 590 MHz enlarge 324KB, 1024x1024 40 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub Elevation Pattern at 650 MHz enlarge 328KB, 1024x1024 41 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub Elevation Pattern at 668 MHz enlarge 329KB, 1024x1024 42 UHF 16-El Yagi + 6RR Corner Wade CYD1446 With Open Matching Stub Elevation Pattern at 698 MHz enlarge 452KB, 1152x648 43 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Overall Photo enlarge 409KB, 1152x648 44 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Along the Boom Showing Corner Reflector enlarge 186KB, 1152x648 45 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Corner Reflector Overview enlarge 324KB, 1152x648 46 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Reflector Element #1 Measurement relative to Intersection of Lines thru Corner Reflector Rods [X=0] enlarge 348KB, 1152x648 47 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Corner Reflector Rod Measurements along 45-deg Angle Diagonal Boom enlarge 226KB, 1152x648 48 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Outer Corner Reflector Rod Measurement enlarge 183KB, 1152x648 49 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Rear Reflector and ACTIVE Dipole Element Measurements along the Boom enlarge 167KB, 1152x648 50 UHF 16-El Yagi + 6RR Corner Wade CYD1446 ACTIVE Dipole Element Measurements enlarge 434KB, 1152x648 51 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Bottom View of [Folded] Open Matching Stub enlarge 323KB, 1152x648 52 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Top View of First Director, ACTIVE Dipole Element and [Folded] Open Matching Stub enlarge 154KB, 1152x648 53 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Director Element Measurements (all the SAME Size) enlarge 195KB, 1152x648 54 UHF 16-El Yagi + 6RR Corner Wade CYD1446 Front of Boom, showing Director Element to Element Spacing (All the SAME)
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