Hi-VHF A-C Y-10-7-13 Dual-Driven Yagi

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Hi-VHF A-C Y-10-7-13 Dual-Driven Yagi

Antennacraft Y-10-7-13, 10-Element, Hi-VHF Dual-Driven Yagi analyzed using 4nec2. Boom Length = 117.4-in + Ends.

Original 4nec2 file and measurements by tripelo on an antenna provided by re_nelson.
Note that the two Driven Elements are the SAME size with an IN-PHASE (not quite) QUARTER-WAVELENGTH feedline,
rather than different length elements with HALF-WAVELENGTH CROSSOVER feedline used in a Log-Yagi.

holl_ands 4nec2 mods: Autosegment(21), variable Rsrc to adjust AGT=1.0, decimal roundoffs and various RP/FR statement choices.

The first set of curves assume a Half-Element Boom Correction of 0.125-inch (tripelo's guess).
The second set of curves assumes ZERO Boom Correction, which is closer to the Top-Of-Boom derating per
discussion found in YA-1713 album. Note 4nec2 predicted improvement in Ch13 Raw Gain & SWR....but predicted
Ch7 Raw Gain roll-off is about the same.

Ch7-12 Raw Gain = 7.5 to 12.8 dBi, but Rolloff on Ch13 May NOT be Real.
Ch7-12 SWR(300-ohms) Under 1.7, but Rise on Ch13 May NOT be Real.

Date(s): 25Jan2011. Album by holl_ands. 1 - 22 of 22 Total. 9304 Visits.

enlarge 396KB, 742x1024 1 A-C Y10-7-13 Hi-VHF Log-Yagi - Photo	enlarge 58KB, 1024x869 2 A-C Y10-7-13 Hi-VHF Log-Yagi - 3D View	enlarge 103KB, 1152x354 3 A-C Y10-7-13 Hi-VHF Log-Yagi - Top View [1 small box = 2.5-in]
enlarge 45KB, 1152x154 4 A-C Y10-7-13 Hi-VHF Log-Yagi - Side View [1 small box = 2.5-in]	enlarge 48KB, 1152x143 5 A-C Y10-7-13 Hi-VHF Log-Yagi - Side View Back Four Elements [1 small box = 2.0-in]	enlarge 54KB, 1152x137 6 A-C Y10-7-13 Hi-VHF Log-Yagi - Rear View [1 small box = 2.0-in]
enlarge 192KB, 1152x717 7 A-C Y10-7-13 Hi-VHF Log-Yagi - BC=0.125 Ch7-12 Raw Gain = 7.5 to 12.8 dBi but Rolloff on Ch13 May NOT be Real	enlarge 194KB, 1152x717 8 A-C Y10-7-13 Hi-VHF Log-Yagi - BC=0.125 Ch7-12 SWR(300-ohms) Under 1.7 but Rise on Ch13 May NOT be Real	enlarge 179KB, 1152x717 9 A-C Y10-7-13 Hi-VHF Log-Yagi - BC=0.125 Hi-VHF Impedance
enlarge 175KB, 1152x717 10 A-C Y10-7-13 Hi-VHF Log-Yagi - BC=0.0 Hi-VHF Raw Gain - Ch13 Rolloff may not be real	enlarge 193KB, 1152x717 11 A-C Y10-7-13 Hi-VHF Log-Yagi - BC=0.0 Hi-VHF SWR(300-ohm) - Ch13 Rise may not be real	enlarge 177KB, 1152x717 12 A-C Y10-7-13 Hi-VHF Log-Yagi - BC=0.0 Hi-VHF Impedance
enlarge 297KB, 1024x1024 13 A-C Y10-7-13 Hi-VHF Log-Yagi - BC=0.0 Azimuthal Pattern at 174 MHz	enlarge 300KB, 1024x1024 14 A-C Y10-7-13 Hi-VHF Log-Yagi - BC=0.0 Azimuthal Pattern at 180 MHz	enlarge 302KB, 1024x1024 15 A-C Y10-7-13 Hi-VHF Log-Yagi - BC=0.0 Azimuthal Pattern at 198 MHz
enlarge 304KB, 1024x1024 16 A-C Y10-7-13 Hi-VHF Log-Yagi - BC=0.0 Azimuthal Pattern at 207 MHz	enlarge 300KB, 1024x1024 17 A-C Y10-7-13 Hi-VHF Log-Yagi - BC=0.0 Azimuthal Pattern at 213 MHz	enlarge 297KB, 1024x1024 18 A-C Y10-7-13 Hi-VHF Log-Yagi - BC=0.0 Azimuthal Pattern at 216 MHz
enlarge 168KB, 1024x677 19 A-C Y10-7-13 Hi-VHF Log-Yagi - BC=0.125 Ch2-6 + FM Band Raw Gain	enlarge 191KB, 1024x677 20 A-C Y10-7-13 Hi-VHF Log-Yagi - BC=0.125 Ch2-6 + FM Band SWR (300-ohms)	enlarge 217KB, 1024x677 21 A-C Y10-7-13 Hi-VHF Log-Yagi - BC=0.125 Ch2-6 + FM Band Impedance
enlarge 29KB, 791x1024 22 Antennacraft Y10-7-13 Hi-VHF Log-Yagi 4nec2 File with holl_ands mods

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looked for the dimensions for the y10-7-13 for quite some time and finally found them. Thanks a million!!
- Gene, Wed, 24 Jan 2018 6:10PM