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2011-10-14, 11:13 PM
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#481 | |
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Veteran
Join Date: Mar 2008
Location: Somewhere in Delaware on the flat side
Posts: 7,012
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Quote:
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2011-10-14, 11:33 PM
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#482 |
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Join Date: Dec 2008
Location: mississauga, ON
Posts: 721
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How many words is a model worth ...
Code:
CM CM Input file: input.nec CM Sweep ranges: CM R0 = (470, 12, 20) with target levels (14, 14.5) CM R1 = (174, 6, 8) with target levels (10, 10.5) CM SWR target: 2 CM Target function: max(max_swr_diff, max_gain_diff) CM CM Score 3.7672 CM CM CM GH6 - split narod CE SY radius=0.003175 SY narod_surf_spacing=0.007924255' 0.005, 0.02 SY narod_spacing=narod_surf_spacing+radius+radius SY feed=0.02732863' 0.02, 0.07 SY b=0.2062741' 0.075, 0.35 SY a1=0.1430161' 0.07, 0.32 SY _G3=0.02807322' 0.016, 0.1 SY a2=a1+feed-_G3'this is to avoid self intersection since _G3 is to be > radius+2.5mm SY a3=0.08348921' 0.07, 0.32 SY x=-0.09356554' -0.11, -0.04 SY g1=0.01518322' 0.002, 0.045 SY g2=0.04434577' 0.002, 0.045 SY g3=0.03151775' 0.002, 0.045 SY l1=0.3003324' 0.1, 0.7 SY l2=0.3358351' 0.1, 0.75 SY l3=0.3741297' 0.1, 0.75 SY _top = a1+a1+feed-_G3+a3''2*.130+.121+.0755-.0605 = .396 SY dz1=0.3547629' 0.05, 0.7 SY z1 = dz1*_top SY dz2=0.5970195' 0.05, 0.7 SY z2 = (dz1+dz2)*_top SY dz3=0.4387679' 0.05, 0.7 SY z3 = (dz1+dz2+dz3)*_top SY ay1=feed+a1 SY ay2=feed+a1-a2 SY ay3=feed+a1-a2+a3 SY ay4=feed+a1-a2+a3+b SY az2=a1+a2 SY az3=a1+a2+a3 SY nz=a1+a2+a3+narod_spacing SY ng=0.1574898' 0.002, 0.2 SY nl=0.6799131' 0.075, 0.75 GW 1 11 0 feed 0 0 ay1 a1 radius GW 2 11 0 ay1 a1 0 ay2 az2 radius GW 3 6 0 ay2 az2 0 ay3 az3 radius GW 4 11 0 ay3 az3 0 ay4 az3 radius GW 5 16 x g1 z1 x l1+g1 z1 radius GW 6 18 x g2 z2 x l2+g2 z2 radius GW 7 20 x g3 z3 x l3+g3 z3 radius GW 8 36 0 ng nz 0 ng+nl nz radius GX 20 010 GX 40 001 GW 100 5 0 -feed 0 0 feed 0 radius*.8675 GE 0 LD 5 0 0 0 24900000 GN -1 EK EX 0 100 3 0 1 FR 0 0 0 0 800 0 EN Code:
Freq RawGain NetGain SWR F/R F/B Real Imag AGT(corr) ================================================================================== 470.0 11.588 11.067 2.012 5.420 25.390 198.33 -141.31 0.98(-0.088) 476.0 12.018 11.579 1.899 6.320 24.360 188.51 -107.87 0.98(-0.088) 482.0 12.318 11.965 1.775 7.070 22.930 188.68 -82.24 0.98(-0.088) 488.0 12.528 12.251 1.661 7.720 21.360 193.89 -63.58 0.98(-0.088) 494.0 12.672 12.455 1.566 8.270 19.730 201.23 -50.79 0.98(-0.092) 500.0 12.762 12.590 1.491 8.730 18.150 208.84 -42.64 0.98(-0.092) 506.0 12.822 12.680 1.436 9.110 16.720 215.63 -37.89 0.98(-0.092) 512.0 12.862 12.741 1.397 9.300 15.450 221.07 -35.36 0.98(-0.092) 518.0 12.882 12.774 1.371 9.390 14.320 225.09 -34.08 0.98(-0.092) 524.0 12.905 12.806 1.353 9.470 13.340 227.88 -33.34 0.98(-0.095) 530.0 12.925 12.831 1.342 9.520 12.470 229.78 -32.67 0.98(-0.095) 536.0 12.945 12.856 1.333 9.560 11.710 231.13 -31.85 0.98(-0.095) 542.0 12.975 12.889 1.324 9.570 11.040 232.24 -30.79 0.98(-0.095) 548.0 13.005 12.923 1.316 9.440 10.430 233.39 -29.53 0.98(-0.095) 554.0 13.048 12.971 1.306 9.330 9.900 234.78 -28.19 0.98(-0.098) 560.0 13.088 13.016 1.294 9.230 9.410 236.54 -26.90 0.98(-0.098) 566.0 13.148 13.081 1.281 8.990 8.990 238.78 -25.87 0.98(-0.098) 572.0 13.208 13.148 1.266 8.600 8.600 241.54 -25.35 0.98(-0.098) 578.0 13.288 13.234 1.251 8.280 8.280 244.80 -25.64 0.98(-0.098) 584.0 13.372 13.323 1.237 7.980 7.980 248.44 -27.10 0.98(-0.102) 590.0 13.462 13.416 1.228 7.740 7.740 252.17 -30.20 0.98(-0.102) 596.0 13.562 13.516 1.228 7.550 7.550 255.40 -35.43 0.98(-0.102) 602.0 13.662 13.610 1.245 7.430 7.430 257.06 -43.20 0.98(-0.102) 608.0 13.752 13.684 1.285 7.390 7.390 255.37 -53.46 0.98(-0.102) 614.0 13.804 13.704 1.355 7.480 7.480 247.93 -64.73 0.98(-0.104) 620.0 13.744 13.594 1.452 7.730 7.730 233.04 -73.06 0.98(-0.104) 626.0 13.484 13.270 1.561 7.690 8.190 212.76 -72.47 0.98(-0.104) 632.0 12.944 12.679 1.643 6.280 8.790 194.60 -59.80 0.98(-0.104) 638.0 12.214 11.943 1.652 4.760 9.020 186.57 -39.27 0.98(-0.104) 644.0 11.589 11.361 1.585 3.610 8.330 190.60 -19.13 0.98(-0.099) 650.0 11.289 11.124 1.477 3.010 7.180 203.20 -5.29 0.98(-0.099) 656.0 11.259 11.154 1.365 2.800 6.190 219.78 0.04 0.98(-0.099) 662.0 11.379 11.317 1.268 2.810 5.510 236.58 -3.35 0.98(-0.099) 668.0 11.549 11.510 1.208 2.890 5.050 250.37 -14.88 0.98(-0.099) 674.0 11.717 11.677 1.212 2.970 4.730 258.00 -33.30 0.98(-0.107) 680.0 11.877 11.806 1.291 2.990 4.510 256.44 -56.00 0.98(-0.107) 686.0 11.987 11.850 1.428 2.960 4.340 243.69 -78.69 0.98(-0.107) 692.0 12.057 11.808 1.618 2.950 4.230 220.16 -96.00 0.98(-0.107) 698.0 12.057 11.639 1.869 2.950 4.170 189.26 -103.25 0.98(-0.107) 174.0 6.771 6.232 2.038 -0.520 -0.520 487.60 205.30 0.98(-0.081) 180.0 7.381 7.156 1.579 -0.540 -0.540 456.41 67.72 0.98(-0.081) 186.0 8.001 7.976 1.163 -0.550 -0.550 346.83 13.07 0.98(-0.081) 192.0 8.581 8.517 1.274 -0.560 -0.560 250.46 44.53 0.98(-0.081) 198.0 9.053 8.610 1.904 -0.560 -0.560 194.51 117.90 0.98(-0.083) 204.0 9.343 8.226 2.819 -0.550 -0.550 173.63 212.51 0.98(-0.083) 210.0 9.433 7.533 3.942 -0.540 -0.540 184.53 328.96 0.98(-0.083) 216.0 9.353 6.744 5.098 -0.530 -0.530 238.98 482.10 0.98(-0.083) |
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2011-10-14, 11:40 PM
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#483 |
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Join Date: Dec 2008
Location: mississauga, ON
Posts: 721
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I also tried without any narods or narod reflectors...
Code:
CM CM Input file: input.nec CM Sweep ranges: CM R0 = (470, 12, 20) with target levels (14, 14.5) CM R1 = (174, 6, 8) with target levels (8, 8) CM SWR target: 2 CM Target function: max(max_swr_diff, max_gain_diff) CM CM Score 4.4348 CM CM CM GH6 CE SY radius=0.003175 SY narod_surf_spacing=0.006 SY narod_spacing=0.012 SY feed=0.02378154' 0.02, 0.07 SY b=0.1918165' 0.075, 0.45 SY a1=0.1552188' 0.07, 0.32 SY _G3=0.03204811' 0.016, 0.1 SY a2=a1+feed-_G3'this is to avoid self intersection since _G3 is to be > radius+2.5mm SY a3=0.08101685' 0.07, 0.32 SY x=-0.04071919' -0.11, -0.04 SY g1=0.03455971' 0.002, 0.045 SY g2=0.03843615' 0.002, 0.045 SY g3=0.03877542' 0.002, 0.045 SY l1=0.3694295' 0.1, 0.7 SY l2=0.7049904' 0.1, 0.75 SY l3=0.6610495' 0.1, 0.75 SY _top = a1+a1+feed-_G3+a3''2*.130+.121+.0755-.0605 = .396 SY dz1=0.2847488' 0.05, 0.7 SY z1 = dz1*_top SY dz2=0.6760169' 0.05, 0.7 SY z2 = (dz1+dz2)*_top SY dz3=0.1041196' 0.05, 0.7 SY z3 = (dz1+dz2+dz3)*_top SY ay1=feed+a1 SY ay2=feed+a1-a2 SY ay3=feed+a1-a2+a3 SY ay4=feed+a1-a2+a3+b SY az2=a1+a2 SY az3=a1+a2+a3 GW 1 12 0 feed 0 0 ay1 a1 radius GW 2 11 0 ay1 a1 0 ay2 az2 radius GW 3 6 0 ay2 az2 0 ay3 az3 radius GW 4 10 0 ay3 az3 0 ay4 az3 radius GW 5 20 x g1 z1 x l1+g1 z1 radius GW 6 38 x g2 z2 x l2+g2 z2 radius GW 6 35 x g3 z3 x l3+g3 z3 radius GX 20 010 GX 40 001 GW 100 5 0 -feed 0 0 feed 0 radius*.8675 GE 0 LD 5 0 0 0 24900000 GN -1 EK EX 0 100 3 0 1 FR 0 0 0 0 800 0 EN Code:
Freq RawGain NetGain SWR F/R F/B Real Imag AGT(corr) ================================================================================= 470.0 11.724 9.888 3.845 6.050 6.050 85.34 -88.43 0.97(-0.144) 476.0 11.694 10.088 3.505 5.830 5.830 90.07 -65.67 0.97(-0.144) 482.0 11.654 10.248 3.219 5.580 5.580 95.64 -46.13 0.97(-0.144) 488.0 11.614 10.380 2.980 5.330 5.330 101.75 -29.05 0.97(-0.144) 494.0 11.585 10.497 2.779 5.090 5.090 108.23 -13.88 0.97(-0.145) 500.0 11.555 10.593 2.609 4.860 4.860 114.99 -0.21 0.97(-0.145) 506.0 11.545 10.691 2.464 4.650 4.650 122.02 12.29 0.97(-0.145) 512.0 11.535 10.775 2.338 4.460 4.460 129.32 23.86 0.97(-0.145) 518.0 11.535 10.857 2.227 4.280 4.280 136.96 34.69 0.97(-0.145) 524.0 11.547 10.941 2.129 4.130 4.130 145.01 44.96 0.97(-0.147) 530.0 11.567 11.026 2.040 4.010 4.010 153.60 54.76 0.97(-0.147) 536.0 11.597 11.115 1.958 3.920 3.920 162.90 64.19 0.97(-0.147) 542.0 11.637 11.210 1.882 3.860 3.860 173.12 73.27 0.97(-0.147) 548.0 11.697 11.321 1.809 3.850 3.850 184.56 81.93 0.97(-0.147) 554.0 11.770 11.442 1.739 3.880 3.880 197.54 89.98 0.97(-0.150) 560.0 11.860 11.578 1.669 3.960 3.960 212.41 97.02 0.97(-0.150) 566.0 11.980 11.742 1.600 4.080 4.080 229.42 102.40 0.97(-0.150) 572.0 12.120 11.925 1.531 4.230 4.230 248.57 105.23 0.97(-0.150) 578.0 12.280 12.123 1.463 4.380 4.380 269.43 104.49 0.97(-0.150) 584.0 12.441 12.319 1.399 4.480 4.480 291.06 99.28 0.97(-0.151) 590.0 12.611 12.518 1.340 4.530 4.530 312.13 89.16 0.97(-0.151) 596.0 12.771 12.701 1.290 4.520 4.520 331.25 74.19 0.97(-0.151) 602.0 12.921 12.867 1.251 4.440 4.440 347.13 54.86 0.97(-0.151) 608.0 13.051 13.006 1.225 4.320 4.320 358.68 31.89 0.97(-0.151) 614.0 13.179 13.137 1.218 4.180 4.180 364.92 6.28 0.97(-0.149) 620.0 13.299 13.254 1.228 4.020 4.020 364.90 -20.68 0.97(-0.149) 626.0 13.409 13.353 1.255 3.820 3.820 358.01 -47.01 0.97(-0.149) 632.0 13.499 13.428 1.293 3.550 3.550 344.51 -69.89 0.97(-0.149) 638.0 13.529 13.440 1.333 3.130 3.130 327.83 -86.11 0.97(-0.149) 644.0 13.399 13.282 1.389 2.660 2.660 315.47 -100.38 0.97(-0.149) 650.0 13.319 13.140 1.504 2.740 2.740 295.38 -122.22 0.97(-0.149) 656.0 13.369 13.111 1.632 2.970 2.970 262.92 -133.93 0.97(-0.149) 662.0 13.389 13.047 1.760 3.060 3.060 230.28 -133.47 0.97(-0.149) 668.0 13.349 12.914 1.893 3.080 3.080 201.02 -124.95 0.97(-0.149) 674.0 13.230 12.695 2.032 3.070 3.070 175.94 -110.85 0.97(-0.140) 680.0 13.030 12.390 2.174 3.040 3.040 155.30 -92.81 0.97(-0.140) 686.0 12.730 11.987 2.313 3.020 3.020 139.04 -72.06 0.97(-0.140) 692.0 12.310 11.473 2.440 3.000 3.000 126.99 -49.49 0.97(-0.140) 698.0 11.740 10.825 2.545 2.980 2.980 118.91 -25.72 0.97(-0.140) 174.0 5.775 3.566 4.426 -0.680 -0.680 217.65 407.88 0.97(-0.135) 180.0 6.385 4.510 3.902 -0.680 -0.680 295.95 437.75 0.97(-0.135) 186.0 7.035 5.526 3.364 -0.680 -0.680 384.03 429.32 0.97(-0.135) 192.0 7.705 6.499 2.940 -0.650 -0.650 431.07 385.12 0.97(-0.135) 198.0 8.315 7.124 2.919 -0.600 -0.600 416.62 379.63 0.97(-0.135) 204.0 8.755 7.060 3.634 -0.570 -0.570 407.00 470.85 0.97(-0.135) 210.0 8.985 6.285 5.258 -0.510 -0.510 485.41 683.95 0.97(-0.135) 216.0 8.655 5.723 5.681 -0.500 -0.500 819.15 823.61 0.97(-0.135) |
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2011-10-15, 12:06 AM
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#484 | |
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Veteran
Join Date: Mar 2008
Location: Somewhere in Delaware on the flat side
Posts: 7,012
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Yeah, kind of like I guessed. It doesnt do anything for vhf-low either.
Quote:
__________________
My builds/plans (not the latest models) are located here. |
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2011-10-25, 08:49 AM
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#485 |
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Join Date: Aug 2009
Location: New Jersey
Posts: 67
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Nikiml,
I have a question regarding the top of the tophat narod. You mention that it should be tilted so it is close to the plane of the top hat reflector. I was wondering if there would be any value in having another reflector for the top of the tophat? Perhaps you already answered this and I missed it. |
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2011-10-25, 09:45 AM
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#486 |
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Join Date: Dec 2008
Location: mississauga, ON
Posts: 721
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lenl,
I am not sure I understand the question. Do you mean something like this model: http://clients.teksavvy.com/~nickm/g..._7V9_14u1.html? |
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2011-10-25, 03:36 PM
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#487 |
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Join Date: Aug 2009
Location: New Jersey
Posts: 67
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TopHat
Nikiml,
Yes, that is sort of what I was looking for although it looks like your GH10 has 2 reflectors sitting above the top of the tophat. I was just thinking about the impact of 1. In any event if looks like there is value to adding some more reflectors to interact with the top of the tophat for even better VHF reception? Also does it really make an impact if those 2 reflector rods are in 2 pieces so you have 4 elements as opposed to a just one piece straight across for each one? I hope my question makes sense to you. I'm asking because it is simpler to build this with one large piece of metal than 2 pieces for each element. At least for me. |
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2011-10-25, 05:46 PM
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#488 |
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Rookie
Join Date: Oct 2011
Posts: 3
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Hey everyone,
I'm trying to figure out how to get a setup running for my location. (Brampton, Torbram & Williams Pkwy) http://www.tvfool.com/?option=com_wr...60b57fe40b2152 I went to Save and Replay, and their suggestion was to go with a CM8 for $100, and if I could, to use an eaves mount on my roof. I would then need the necessary coaxial cable, connectors, crimping tool, cutting tool, grounding wire and grounding rod. So all told, I'd be looking at investing at $230. However, I've never done OTA before, and I'd like to test-run it before I make a massive investment. I could buy the CM8, stick it on a broomstick and see what I get, but then I'm out the 20% restocking fee. I figure, for around $20, I could probably build the GH10n3 highlighted here. I have an EE degree, so electromagnetics and antennas are not outside of my scope of understanding. I can do this. My question is about construction and materials. I understand the schematics shown on nikiml's site, but they just show you the dimensions and placement of each of the antenna's elements. Is there a bill of materials and full schematic? Or do I have to come up with it on my own? Where can I find the necessary parts and materials? How much can I expect to spend? How long to build it? I've wanted to do this for the longest time, so I'm excited about getting into this. Any and all help is appreciated! |
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2011-10-25, 05:57 PM
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#489 |
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Join Date: Dec 2008
Location: mississauga, ON
Posts: 721
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re: TopHat
Well, it seems that long colinear reflectors around the hat do increase the VHF-hi gain. About the gapless reflectors question, I have never tried that. Also I have never tried maximizing the VHF-hi gain by itself, instead I have always tried to get balanced UHF/VHF/hi gain. So, yes - there are more options to be investigated about getting more VHF-hi. The latest version of my nec.opt scripts seems to work very well and is much faster than what it was when I started. Currently I am rerunning the Modular GH4n with it and I get considerable improvement on the VHF-hi gain. What exactly are your VHF-hi gain requirements? May be we can try to push the GH in that direction. |
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2011-10-25, 06:08 PM
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#490 |
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Join Date: Dec 2008
Location: mississauga, ON
Posts: 721
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lenl, may be you can take a look at the model from post 93.
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2011-10-25, 07:15 PM
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#491 |
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Join Date: Dec 2008
Location: mississauga, ON
Posts: 721
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Hi HorizonXP,
I don't remember seeing complete bill of materials for any of my antennas. As for the antenna choice I am in a somewhat similar situation as you (Derry&Churchill), and I am thinking of building UHF only directional antenna pointed towards Buffalo and bidirectional VHF-hi pointed at Hamilton/Barrie. In your exact situation I'd try this GH8, which whn pointed at Buffalo should get you Toronto from 30 degrees ( since VHF-hi 7 from Buffalo seems out of reach for you). And if you want /A\ and CHCH add (pointed at Hamilton/Barrie) a Hentenna for 192Mhz or something like that: Code:
CM CM Sweep ranges: CM R0 = (186, 6, 4) with target levels (6.5, 6.5) CM SWR target: 2 CM Target function: max(max_swr_diff, .5*ave_max_gain_diff+.5*ave_gain_diff) CM CM Score -0.322306 CM CE SY radius=0.003175 SY feed=0.04255066' 0.001, 0.07 SY width1=0.2570224' 0.01, 0.5 SY width2=0.259373' 0.01, 0.5 SY top=0.3103416' 0.1, 1 SY bottom=0.3617746' 0.01, 0.6 SY fheight1=0.3596002' 0.05, 0.4 SY fheight2=0.3447194' 0.05, 0.4 SY c = (top-bottom)/2 + (fheight1-fheight2)/2 SY w1 = width1+feed SY w2 = width2+feed SY f = feed GW 1 8 0 w1 fheight1 0 w1 fheight1+top radius GW 2 6 0 f fheight1 0 w1 fheight1 radius GW 3 9 0 f fheight1 0 f 0 radius GW 4 9 0 w2 -fheight2 0 w2 -fheight2-bottom radius GW 5 6 0 f -fheight2 0 w2 -fheight2 radius GW 6 8 0 f -fheight2 0 f 0 radius GX 7 010 GW 10 15 0 -w2 -fheight2-bottom 0 w2 -fheight2-bottom radius GW 11 15 0 -w1 fheight1+top 0 w1 fheight1+top radius GW 100 3 0 -f 0 0 f 0 radius*1.5 GM 0 0 0 0 0 0 0 -c 1 GE 0 LD 5 0 0 0 24900000 GN -1 EK EX 0 100 2 0 1 0 0 FR 0 8 0 0 174 6 EN Code:
Freq RawGain NetGain SWR F/R F/B Real Imag AGT(corr) ================================================================================== 174.0 6.866 5.618 2.998 0.000 0.000 172.94 230.11 0.93(-0.306) 180.0 6.966 6.176 2.377 0.000 0.000 263.69 248.54 0.93(-0.316) 186.0 7.036 6.603 1.890 0.000 0.000 383.88 202.98 0.93(-0.326) 192.0 7.087 6.878 1.553 0.000 0.000 452.33 59.16 0.93(-0.337) 198.0 7.097 6.960 1.428 0.000 0.000 390.74 -82.53 0.92(-0.347) 204.0 7.067 6.851 1.565 0.000 0.000 281.58 -129.95 0.92(-0.357) 210.0 7.007 6.587 1.871 0.000 0.000 198.53 -117.71 0.92(-0.367) 216.0 6.885 6.179 2.265 0.000 0.000 146.55 -86.60 0.92(-0.375) But I should note that I have seen many complains about the receive-ability of CHCH and some about /A\ as well. May be others can share their experience. |
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2011-10-25, 07:24 PM
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#492 |
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Join Date: Dec 2008
Location: mississauga, ON
Posts: 721
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And if you want to build single antenna it should be one of the GH6n, GH8n or GH10n.
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2011-10-25, 08:59 PM
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#493 | |
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Veteran
Join Date: Mar 2008
Location: Somewhere in Delaware on the flat side
Posts: 7,012
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Quote:
Most build a structure from pvc pipe and fittings. The grey electrical pvc pipe is cheaper than the white pvc pipe, but you can use the white pvc fittings with it. With careful shopping a GH10n3 should be less than $30 in materials and can be built in an afternoon. A GH8n3 is even less in time and materials.
__________________
My builds/plans (not the latest models) are located here. |
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2011-10-25, 10:11 PM
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#494 |
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Rookie
Join Date: Oct 2011
Posts: 3
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Here's my current plan to build the GH10n3:
Get some ALUMINUM ROUND 6061T6 from Metal Supermarkets. Their online quote is telling me that 52' of 0.25" will cost $27.83, while the same length of 0.188" will cost $35.66. I'm hoping that the in-store price could be a bit cheaper, or that I can get a student discount. I figure I could follow the plans from this Instructable: http://www.instructables.com/id/Gray...mbly/?ALLSTEPS or http://www.casano.com/projects/hoverman/index.html to create the framing. I'll see if I can plan this out in some 3D modelling program. I'd prefer to know how I'm going to cut and assemble the PVC pieces before I set out to do this. So on top of aluminum round, all I need is PVC pipes and fittings, a balun, and some coax cable. That should get me an antenna that will pull in all the stations I want, provided I mount it sufficiently on my roof. Under $50 maybe? |
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2011-10-26, 02:17 AM
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#495 |
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Rookie
Join Date: Sep 2011
Location: Burnside-Eldon Place, Victoria BC
Posts: 14
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HorizonXP - I recommend drafting a list of the lengths of rod you need and have the metal shop do the cutting. I would also take along a paper template of the active element and have them bend the rod. After all, they probably have the equipment to make the finished product look nice. And it is so much less trouble if you don't have the right equipment.
Note that the Casano model is a double bay GH; you might only need a single bay GH antenna if you have a clear shot to the transmitters. I have made 2 single bay GH so far and I discovered that 1/16" copper coated welding wire is very effective for all elements. It has a steel core that adds strength. I bought 99 feet of the stuff in 3 foot lengths for $8 dollars from Princess Auto. My GH are strictly used indoors in my condo so I was able to make both from kiln dried wood. I am using a Kitz Technologies KT-100VG as an amplifier to increase the signal strength of some of the stations. Having tried the welding rod version at 2 indoor locations, I am impressed at how well it performs under less than ideal conditions (the amplifier helps). Have fun! |
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