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#21
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On May 1, 7:37*pm, "Dave" wrote:
"Art Unwin" wrote in message ... David, the antenna covers the distance covered by a mfj 259 b which is 1.7 to around 175 mega hz. Obviously it therefore has no limits above .Below I cannot measure unless I modify my radio outside the amateur bands, ie reflect swr outside the ham *bands. Beam widths I can't determine as I do not have enough segments available on my optimizer program . But I believe that can be accomplished. but wait... you have built it.. you can measure the swr, so why can't you measure the beamwidth? *pick an AM broadcast station and turn it and see how wide the pattern is. I dont know if Dave built it or not but I did and tested the beamwidth just as you said and got 360 degrees. Rotating it had no effect at all on signal strength. I tried it on 2M and couldnt hit the local repeater with 1 watt normally I can reach it with 100mW. I would say this classifies the antenna as a dummy load. Jimmie |
#22
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On Fri, 1 May 2009 17:35:36 -0700 (PDT), JIMMIE
wrote: I dont know if Dave built it or not but I did and tested the beamwidth just as you said and got 360 degrees. Rotating it had no effect at all on signal strength. I tried it on 2M and couldnt hit the local repeater with 1 watt normally I can reach it with 100mW. Hi Jimmie, Try it again on Saturday and Sunday to see if its more attuned to the Weekend force. 73's Richard Clark, KB7QHC |
#23
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On May 1, 7:35*pm, JIMMIE wrote:
On May 1, 7:37*pm, "Dave" wrote: "Art Unwin" wrote in message .... David, the antenna covers the distance covered by a mfj 259 b which is 1.7 to around 175 mega hz. Obviously it therefore has no limits above .Below I cannot measure unless I modify my radio outside the amateur bands, ie reflect swr outside the ham *bands. Beam widths I can't determine as I do not have enough segments available on my optimizer program . But I believe that can be accomplished. but wait... you have built it.. you can measure the swr, so why can't you measure the beamwidth? *pick an AM broadcast station and turn it and see how wide the pattern is. I dont know if Dave built it or not but I did and tested the beamwidth just as you said and got 360 degrees. Rotating it had no effect at all on signal strength. I tried it on 2M and couldnt hit the local repeater with 1 watt normally I can reach it with 100mW. I would say this classifies the antenna as a dummy load. Jimmie But Jimmie I have not divulged the full story. It is up to you to determine the merits of antennas that you make without posessing the full instructions. I was intent on sharing all with my fellow hams but after the pilloring of the Dr who came on board so that he could help with the problems that the group were having with mathematics and Maxwell it appeared to me that most thought all was known about antennas thus all is known about mine. I don't mind if you think it is a dummy load since I do not know the merits of your education. You may well be the same person who was argueing at the same time who admitted to never graduating from high school. David I have ordered some remote relays so that I can operate the camera scan and rotate mechanism that I use to carry the antenna and every thing takes time. I would also remind you that beam width can only be determined in terms of point to point transmissions and grazing angles on ground level antennas can create havoc. Either way, you never did concur with the mathematics presented on this antenna so I thought you should drop the subject all together since you seem to be my superior in these matters and feel you have proved my mathematics in error. Suffice to say I have described the abilities of my antenna and care not whether you can believe it or not until you delve more into Maxwell's laws in light of what I have stated. Rest assured that Richard still agrees with your assesment a judgement you should feel confident about. Grin Let us move on and let somebody else take over this thread for their own use which is now coming to be the norm. Art |
#24
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Richard Clark wrote:
On Fri, 01 May 2009 22:37:24 GMT, "Dave" wrote: I'll make it easy, 10 degree beamwidth and 30MHz bandwidth. At how many GHz? snip Richard Clark, KB7QHC At 160m. You can't possibly have missed that, Richard. Art has stated it dozens of times. Maybe hundreds. He's nuts, and very thorough about it. tom K0TAR |
#25
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Art Unwin wrote:
On May 1, 7:35 pm, JIMMIE wrote: snip Jimmie But Jimmie I have not divulged the full story. It is up to you to determine the merits of antennas that you make without posessing the full instructions. I was intent on sharing all with my fellow hams but after the pilloring of the Dr who came on board so that he could help with the problems that the group were having with mathematics and snip again Art Art You have claimed time and time again that you have told us all we need to know to make this antenna and its brethren. So what have you invented now? Something new and double secret I'd bet. tom K0TAR |
#26
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On May 1, 9:01*pm, Tom Ring wrote:
Richard Clark wrote: On Fri, 01 May 2009 22:37:24 GMT, "Dave" wrote: I'll make it easy, 10 degree beamwidth and 30MHz bandwidth. At how many GHz? snip Richard Clark, KB7QHC At 160m. *You can't possibly have missed that, Richard. *Art has stated it dozens of times. *Maybe hundreds. He's nuts, and very thorough about it. tom K0TAR Tom, you are a real misery. Are you suffering from depression? In this group some are so dense you have to state things a hundred times at least |
#27
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On May 1, 9:09*pm, Tom Ring wrote:
Art Unwin wrote: On May 1, 7:35 pm, JIMMIE wrote: snip Jimmie But Jimmie I have not divulged the full story. It is up to you to determine the merits of antennas that you make without posessing the full instructions. I was intent on sharing all with my fellow hams but after the pilloring of the Dr who came on board so that he could help with the problems that the group were having with mathematics and snip again Art Art You have claimed time and time again that you have told us all we need to know to make this antenna and its brethren. So what have you invented now? *Something new and double secret I'd bet.. tom K0TAR Many times things go out one ear and out the other, perforated ear drums does that for you. You have not yet recanted your position on Maxwell's laws and I told you everything. Without recanting your position on Maxwell then all I state obviously goes in one ear and out the other. From what you stated on Maxwell it is obvious that my logic on every thing is not acceptable to you. From your stand point I am a liar with respect to my antenna as you have deemed it impossible. From a person who knows all that there is to know about antennas you discussing it more seems quite sense less. And yet thru the years nobody has pointed out an error in my statements. If one did so and me knowing that I have such an antenna I would have to rethink my logic as to why it works the way it does. It is small and light enough to hold out on one hand and works on 160 which you say is impossible. And you are correct at least in your own mind since you have stuck with planar designs despite its contradictions with Maxwell. |
#28
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On Fri, 01 May 2009 21:01:26 -0500, Tom Ring
wrote: I'll make it easy, 10 degree beamwidth and 30MHz bandwidth. At how many GHz? At 160m. Art is careful to never give every detail. Experience has taught him that doing that leads to the quick thud of deflating claims. Like Cecil, always arguing about a detail means never having to say you're sorry. You can't possibly have missed that, Richard. Art has stated it dozens of times. Maybe hundreds. Well, perhaps 11 times or 99, I pulled the plug on him and only hear his postings as static behind other conversation. 10 years of his dull needle stuck in the same worn groove has lost its -um- charm. Same thing for Cecileo's preaching from the gallows hoping that the last fall will give him enough swing to kick someone in the nuts. 73's Richard Clark, KB7QHC |
#29
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On May 1, 8:20*pm, Art Unwin wrote:
I don't mind if you think it is a dummy load since I do not know the merits of your education. You may well be the same person who was argueing at the same time who admitted to never graduating from high school. You know damn well who is who around here. I could come back with my meager formal training and bitch slap your theory into submission, but it gets really boring arguing a subject with the crack spiders bitch. http://www.youtube.com/watch?v=sHzdsFiBbFc |
#30
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![]() "JIMMIE" wrote in message ... On May 1, 7:37 pm, "Dave" wrote: I dont know if Dave built it or not but I did and tested the beamwidth just as you said and got 360 degrees. Rotating it had no effect at all on signal strength. I tried it on 2M and couldnt hit the local repeater with 1 watt normally I can reach it with 100mW. I would say this classifies the antenna as a dummy load. no, i am waiting for the final tweaked design. if you have built one to art's specs then you are probably measuring just the side/back lobes, which is a very good sign. if it has a pencil beam on 160m, then by the time it gets to 2m the beam will probably be so thin that it will be like a laser beam, so you'll have to be pointing it VERY accurately on the repeater. so go rotate it again, very slowly and carefully, and don't forget to aim it in elevation also! |
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