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7 Elements Yagi

7 Elements Yagi

Postby qrz11 » 13 Feb 2011, 14:23

* TNX to 19 SD 348 *

7 ELEMENTS YAGI

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The antenna in the middle is from Bruno 3DX013 although it has a very
small boom Bruno confirmed already 256 DXCC with the antenna.
Well, I hope you and your neighbours know what you are doing when
building monsters like these.
Dont forget to enlargen the boom-thickness and extra boom guiding wires
for stabitlity!

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HPSD 7 extra short
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Atlhough this 7 elements is too short to be called a 7 elements, it has
some great features for stacking it has a very wide SWR pattern a high
Front to side and the Front to back is also over a wide region availible.
It is an ideal antenna for stacking.


7 elements BOOMLENGHT 11,55 meter Type : HPSD 7 extra short

Design frequentie : 27,55 mhz-------------A = 4,72 m-----H = 3 m
Gain : 9,57dBD (11,71 dBI)-----------------B = 4,88 m-----I = 2,79 m
F/B = 34,19 dB--------------------------------C = 4,89 m----- J = 2,07 m
F/S = 23,5 dB----------------------------------D = 4,908 m-----K = 1,6 m
Beamwidht = 36,2 deg----------------------E = 4,99 m-----L = 0,63 m
Bandwidht = 1,7 Mhz------------------------F = 5,34 m-----M = -1,46 m
Element thickness = 22 mm----------------G = 5,48 m


SHORT version BOOMLENGTH 14,4 meters
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7 elements BOOMLENGTH 14,4 m TYPE : HPSD 7 short

Design frequentie = 27,55 mhz----------A = 4,64 m-----H = 3,2 m
Gain = 10,17 dBD ( 12,41 dBI)-----------B = 4,88 m-----I = 3,45 m
F/B = 38,38 dB------------------------------C = 4,90 m-----J = 2,38 m
F/S = 11,11 dB------------------------------D = 4,92 m-----K = 2,07 m
Beam-width = 48,2 degrees-------------E = 4,96 m-----L = 1,9 m
Band-width = 700 Khz--------------------F = 5,16 m-----M = -1,4 m
Element thickness = 22 mm-------------G =5,56 m


long version 18 meter boomlenght
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7 elements BOOMLENGTH 17,8 meters Type: HPSD 7 Long

Design freq = 27,5 mhz--------------A = 4,72 m-----H = 3,23 m
Gain = 11 dBD (13,14dBI)-----------B = 4,74 m-----I = 4,08 m
F/B = 43 dB-----------------------------C = 4,80 m-----J = 3,78 m
F/S = 17,2 dB---------------------------D = 4,95 m-----K = 2,92 m
Beam width = 46,4 degrees---------E = 5,06 m-----L = 1,90 m
Band width = 600 Khz----------------F = 5,18 m-----M = -1,89 m
Element thickness = 22 mm---------G = 5,38 m



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qrz11
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