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#1
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On Sep 17, 12:24*pm, "Wayne" wrote:
"Art Unwin" wrote in message ... On Sep 16, 3:39 pm, "Wayne" wrote: "Art Unwin" wrote in message ....I consider it a real shame that equilibrium is not a part of examinations since equilibrium is a basic in the electrical circuit of all antennas No where do I see antennas explained other than the showing of capacitive coupling to ground of antennas as a perceived circuit of an antenna?. Until this is corrected we will never have continium of discussion between hams on antennas.It is not a mystery anymore so why do the ARRL avoid it like a plague? Art - My engineering training is many years old now, but I haven't seen equilibrium in the context of antennas discussed anywhere except by you, in this newsgroup. Do you have any references to papers that have been peer reviewed and published? Oh I suppose a search on google re antennas and equilibrium will get you something to read but difficult if you are starting from Zero. - - I'm not starting from zero, but it has been a number of years since I did theoretical analysis. When I google "equilibrium" and then start trying to filter the responses down to things that are potentially "on topic", the references lead back to you on this newsgroup. The point where you begin is Newtons laws, if they are in error then so am I I doubt if you will find anything that definitely proves that he is wrong.If a professor does not know what I have stated he should be nfired which goes for some of the people at *University of Illinois in the electrical engineering area. - I'm not saying that you are wrong. *But your claims would hve much more credibility if they were explained somewhere in addition to r.r.a.a. .EVERYTHING in science revolves around equilibrium. If a posting denys that or does not respond to that Law i will not respond and that includes Richard whose sole aim in life if to divert the crowd with off topic nothings as he does not ahve any engineering degree from any accredited college and thus is a pretender looking for a date with any poster. Art Wayn everybody wants me to answer their questions and not address mine so they took over the thread So to clear the air I started at the very beginning a radiator in equilibrium and what it presents to me. It has nothing to do with any of the sciences presented by the posters. In direct terms I have stated that current flows down the center of a radiator if it is of a fractional wave length. A very simple statement which nobody wishes to address. Fine by me, the thread would then have a single posting and the multitude can generate questions and discussion about deep space or other topics of choice. Ofcourse I am not knowledable in those areas and I would stand aside. I would prefer however the discussion to at least start with equilibrium which leads to why or why not it is correct that current can flow thru the center of a conductor the answer of which is not in the books. Some people prefer to read the last page of the book first. I prefere to examine foundations before determining the merits of a house. Regards Art |
#2
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In direct terms I have stated that current flows down the
center of a radiator if it is of a fractional wave length. A very simple statement which nobody wishes to address. Fine by me, the thread would then have a single posting and the multitude can generate questions and discussion about deep space or other topics of choice. |
#3
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In direct terms I have stated that current flows down the
center of a radiator if it is of a fractional wave length. A very simple statement which nobody wishes to address. Fine by me, the thread would then have a single posting and the multitude can generate questions and discussion about deep space or other topics of choice. Severns, QEX, Nov/Dec 2000, pp 20-29 does address the issue. On page 22: "At some points within the wire, the instantaneous current is actually flowing backwards (minus signs) due to the self-induced eddy currents that are the underlying phenomena responsible for skin effect." These results were verified with Ansoft's "Maxwell" FEM software. An excellent treatment of the math can be found at: http://www.g3ynh.info/zdocs/comps/zint.html Frank |
#4
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Art Unwin wrote:
snip In direct terms I have stated that current flows down the center of a radiator if it is of a fractional wave length. OK, you must be talking about an AC current as there is a wavelength involved. But if you are implying there is current in the center matching the amplitude of the current on the surface you are wrong. See this link http://en.wikipedia.org/wiki/Skin_depth Note the phrase regarding current;"the magnitude of which is greatest at the conductor's surface". This is where the current is. There is also this statement "the current can be flowing in the opposite direction to that at the surface." Note that there are qualifications on that statement (on the page referenced). So, while there can be some current flowing inside the conductor, it does not say it is a matching current in the other direction. By saying most of the current is at the surface, it conflicts with your statement. A very simple statement which nobody wishes to address. You are trying to apply "For a force there is always an equal and opposite reaction: or the forces of two bodies on each other are always equal and are directed in opposite directions." (from "http://en.wikipedia.org/wiki/Newton%27s_laws_of_motion" ) You make a simple statement, brought about but applying a concept incorrectly. I don't think Newton said anything about electricity and flow in conductors. Newton's law doesn't say what the opposing force is, so I don't think you can say it is anything specific. snip I would prefer however the discussion to at least start with equilibrium which leads to why or why not it is correct that current can flow thru the center of a conductor the answer of which is not in the books. The right books would tell you that AC current does not flow in the center of a conductor. As others have stated, you need to clearly define what _you_ mean by equilibrium. Some people prefer to read the last page of the book first. I prefere to examine foundations before determining the merits of a house. Those foundations need to take into account all the considerations, not just the ones you know or want to talk about. You may have read some of the book, but you skipped quite a few chapters. Regards Art Consider your statement to have been addressed. You will note that both links include some math. This is something you don't provide with your explanations. If you went through the rigor to work out the math and present it to the group with sufficient clarity you might get someone to believe you. If you want someone to believe you, it is up to you to effectively communicate your ideas. It is hard to tell if you have a useful concept regarding antennas, are completely lost, or just a troll. But, just in case you have something, then... Many antennas are built using tubing for light weight. So, if there is a current flowing in the middle, it is good that the ends of the tubes are crimped, or plugged. I wouldn't want the flowing electrons spilling out onto my lawn. |
#5
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On Sep 16, 4:07*pm, Art Unwin wrote:
On Sep 16, 3:39*pm, "Wayne" wrote: "Art Unwin" wrote in message ...Iconsi der it a real shame that equilibrium is not a part of examinations since equilibrium is a basic in the electrical circuit of all antennas No where do I see antennas explained other than the showing of capacitive coupling to ground of antennas as a perceived circuit of an antenna?. Until this is corrected we will never have continium of discussion between hams on antennas.It is not a mystery anymore so why do the ARRL avoid it like a plague? Art - My engineering training is many years old now, but I haven't seen equilibrium in the context of antennas discussed anywhere except by you, in this newsgroup. *Do you have any references to papers that have been peer reviewed and published? Oh I suppose a search on google re antennas and equilibrium will get you something to read but difficult if you are starting from Zero. The point where you begin is Newtons laws, if they are in error then so am I I doubt if you will find anything that definitely proves that he is wrong.If a professor does not know what I have stated he should be nfired which goes for some of the people at *University of Illinois in the electrical engineering area. EVERYTHING in science revolves around equilibrium. If a posting denys that or does not respond to that Law i will not respond and that includes Richard whose sole aim in life if to divert the crowd with off topic nothings as he does not ahve any Wayne engineering degree from any accredited college and thus is a pretender looking for a date with any poster. Art Wayn e I stated that I started at the point of first principles which is Newton and I went from there. There is not a book that I know that starts there. You want a lst of authors that physics examiners look for to determine what"famous " people will side with him if he accepts it. That lesson is not lost on all that aspire to heights in the academic world so a paper MUST be buillt on the works of others whose work has been accepted. In my case I start at a point where the shoulders that I stand aupon are all dead. I made reference to Newton only and I havent got a list of supporters. So I start at the beginning with just one name in consideration to isolate the point of possible error. The ARRL infers the circuit is the capacitance to ground where as I put the cuircuit as going thru the center of the conductor. I dont see the need to bring in quantum physics or to speculate about photons or massless items or how many gears that they can race thru to obtain the speed of light. I was not an electrical engineer and I am not wired like Richard as I have a wife and I am a great grandpa and no wish to be any part of his world. My subject is and will always be until in someway I am satisfied is what is the electrical circuit of a fractional wavelength antenna which is not specifically stated in the books and where every poster is waiting for somnebody else to dip his toe in the water and thus avoid any subsequent verbal thrashing. I can never point to a list of supporting evidence beyond Newton and his laws. Best regards.....I have to cut an acre of grass with a hand mower as my daily excercise yes I do have a tractor but that is not excercise Art |
#6
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On Tue, 16 Sep 2008 08:06:15 -0700 (PDT), Art Unwin
wrote: I consider it a real shame that equilibrium is not a part of examinations since equilibrium is a basic in the electrical circuit of all antennas A very simple observation: Give us one question you would expect to see. Give us the answer that would be marked as passing. Without both, this sappy sentiment of yours is nothing more than a late night exercise of crying bitter tears into the pillow - and leaving the window open so the neighbors can hear the sobs of regret. 73's Richard Clark, KB7QHC |
#7
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On Tue, 16 Sep 2008 20:33:04 -0700, Richard Clark
wrote: On Tue, 16 Sep 2008 08:06:15 -0700 (PDT), Art Unwin wrote: I consider it a real shame that equilibrium is not a part of examinations since equilibrium is a basic in the electrical circuit of all antennas A very simple observation: Give us one question you would expect to see. Give us the answer that would be marked as passing. Without both, this sappy sentiment of yours is nothing more than a late night exercise of crying bitter tears into the pillow - and leaving the window open so the neighbors can hear the sobs of regret. It appears that sentimentality rules the thread. Lacking any steps taken by Art towards providing a question with its corresponding answer must mean he couldn't pass the same test it might be placed in. Barring Art's hesitancy to supply his own solution, I can only rummage up a similar instance from him where we might make this a quality of test a CBer might tackle that is drawn from patented (5,625,367) technology: Q. reflector element is usually tuned to a frequency slightly higher than the driver resonant frequency - TRUE or FALSE? Q. director elements are usually tuned to frequencies slightly lower than the driver resonant frequency - TRUE or FALSE? Thankfully, the PTO does not test nor issue licenses based upon this technology source used as reference material. I can well imagine how "equilibrium" would similarly pollute the question pool and the lack of follow-up leaves us with the soap opera it was always meant to be. 73's Richard Clark, KB7QHC |
#8
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On Tue, 16 Sep 2008 22:52:40 -0700, Richard Clark
wrote: On Tue, 16 Sep 2008 20:33:04 -0700, Richard Clark wrote: On Tue, 16 Sep 2008 08:06:15 -0700 (PDT), Art Unwin wrote: I consider it a real shame that equilibrium is not a part of examinations since equilibrium is a basic in the electrical circuit of all antennas A very simple observation: Give us one question you would expect to see. Give us the answer that would be marked as passing. Without both, this sappy sentiment of yours is nothing more than a late night exercise of crying bitter tears into the pillow - and leaving the window open so the neighbors can hear the sobs of regret. It appears that sentimentality rules the thread. Lacking any steps taken by Art towards providing a question with its corresponding answer must mean he couldn't pass the same test it might be placed in. Barring Art's hesitancy to supply his own solution, I can only rummage up a similar instance from him where we might make this a quality of test a CBer might tackle that is drawn from patented (5,625,367) technology: Q. reflector element is usually tuned to a frequency slightly higher than the driver resonant frequency - TRUE or FALSE? Q. director elements are usually tuned to frequencies slightly lower than the driver resonant frequency - TRUE or FALSE? Thankfully, the PTO does not test nor issue licenses based upon this technology source used as reference material. I can well imagine how "equilibrium" would similarly pollute the question pool and the lack of follow-up leaves us with the soap opera it was always meant to be. It is painfully obvious that Art will never offer the questions only he can sign off on. The other Newtonian Philosopherz are equally flummoxed. As for others following this tempest in a teapot, Art has already answered the two TRUE/FALSE questions above: Q. reflector element is usually tuned to a frequency slightly higher than the driver resonant frequency - TRUE! Q. director elements are usually tuned to frequencies slightly lower than the driver resonant frequency - TRUE! and thus fulfills my observation he couldn't pass a test he Authured. Gad, the irony is thick and gooey sweet. 73's Richard Clark, KB7QHC |
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