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 holl_ands | Home > Gray-Hoverman Antennas > 
Lo+Hi-VHF SBGH w NARODS
Lo+Hi-VHF SBGH (Single Bay Grey-Hoverman) w NARODS analyzed using 4nec2.

Two versions were analyzed: GHn2 is constrained to about 89-in x 89-in with 4 NARODS in the middle.
GNn4 is a larger 98-in x 98-in with 8 NARODS in the middle, providing better Gain on Ch7-13.

GHn2 from nikiml's optimized 4nec2 file: http://clients.teksavvy.com/~nickm/gh_n_vV/gh2n_4v2_6V9.html
GHn2 provides about 4-5 dBi Gain in Ch2-9 and about 9 dBi gain on Ch10-13 with SWR under 2.9.

GHn4 from nikiml's optimized 4nec2 file: http://clients.teksavvy.com/~nickm/gh_n_vV/gh4n_4v75_10V7.html
GHn4 provides about 5-6 dBi Gain on Ch2-6 and 10-11 dBi Gain on Ch7-13 with SWR under 2.6.
Date(s): 24 Nov 2012. Album by holl_ands. 1 - 30 of 30 Total. 8901 Visits.
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Enlarge photo 1
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Lo+Hi-VHF SBGH w NARODS - GHn2
3D View
Overall about 89-in x 89-in


Enlarge photo 2
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Lo+Hi-VHF SBGH w NARODS - GHn2
Front View
[1 big box = 12.5-inches]
Overall about 89-in x 89-in


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Lo+Hi-VHF SBGH w NARODS - GHn2
Side View
[1 big box = 12.5-inches]


Enlarge photo 4
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Lo+Hi-VHF SBGH w NARODS - GHn2
Ch2-13 Raw Gain
Ch2-9: 4-5 dBi, Ch10-13: about 9 dBi


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Lo+Hi-VHF SBGH w NARODS - GHn2
Ch2-13 SWR (300-ohms)


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Lo+Hi-VHF SBGH w NARODS - GHn2
Ch2-13 Impedance


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Lo+Hi-VHF SBGH w NARODS - GHn2
Azimuthal Pattern at 54 MHz (Ch2)


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Lo+Hi-VHF SBGH w NARODS - GHn2
Azimuthal Pattern at 72 MHz (Ch4)


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Lo+Hi-VHF SBGH w NARODS - GHn2
Azimuthal Pattern at 84 MHz (Ch6)


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Lo+Hi-VHF SBGH w NARODS - GHn2
Azimuthal Pattern at 174 MHz (Ch7)


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Lo+Hi-VHF SBGH w NARODS - GHn2
Azimuthal Pattern at 198 MHz (Ch10)


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Lo+Hi-VHF SBGH w NARODS - GHn2
Azimuthal Pattern at 216 MHz (Ch13)


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Lo+Hi-VHF SBGH w NARODS - GHn2
Top View
[1 big box = 12.5-inches]


Enlarge Microsoft Word Document 14
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DOC14
Lo+Hi-VHF SBGH w NARODS - GHn2
4nec2 File


Enlarge Microsoft Word Document 15
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DOC15
Lo+Hi-VHF SBSH w NARODS - GHn2
4nec2 Optimization File
GH2n_4v2_6V9_nikiml_PY.nec


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Lo+Hi-VHF SBGH w NARODS - GHn4
3D View
Overall about 98-in x 98-in


Enlarge photo 17
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17
Lo+Hi-VHF SBGH w NARODS - GHn4
Front View
[1 big box = 12.5-inches]
Overall about 98-in x 98-in


Enlarge photo 18
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18
Lo+Hi-VHF SBGH w NARODS - GHn4
Side View
[1 big box = 12.5-inches]


Enlarge photo 19
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19
Lo+Hi-VHF SBGH w NARODS - GHn4
Ch2-13 Raw Gain
Ch2-6: 4-6 dBi, Ch7-13: 10-11 dBi


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Lo+Hi-VHF SBGH w NARODS - GHn4
Ch2-13 SWR (300-ohms)


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Lo+Hi-VHF SBGH w NARODS - GHn4
Ch2-13 Impedance


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Lo+Hi-VHF SBGH w NARODS - GHn4
Azimuthal Pattern at 54 MHz (Ch2)


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Lo+Hi-VHF SBGH w NARODS - GHn4
Azimuthal Pattern at 72 MHz (Ch4)


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Lo+Hi-VHF SBGH w NARODS - GHn4
Azimuthal Pattern at 84 MHz (Ch6)


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Lo+Hi-VHF SBGH w NARODS - GHn4
Azimuthal Pattern at 174 MHz (Ch7)


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Lo+Hi-VHF SBGH w NARODS - GHn4
Azimuthal Pattern at 198 MHz (Ch10)


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Lo+Hi-VHF SBGH w NARODS - GHn4
Azimuthal Pattern at 216 MHz (Ch13)


Enlarge photo 28
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Lo+Hi-VHF SBGH w NARODS - GHn4
Top View
[1 big box = 12.5-inches]


Enlarge Microsoft Word Document 29
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DOC29
Lo+Hi-VHF SBGH w NARODS - GHn4
4nec2 File


Enlarge Microsoft Word Document 30
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DOC30
Lo+Hi-VHF SBSH w NARODS - GHn4
4nec2 Optimization File
gh4n_4v75_10V7.nec


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I have a GH that does not receive VHF very well and I am looking to modify the design
 - 
Mike Horton, Thu, 26 Nov 2015 11:07AM