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#1
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Wes Stewart wrote:
Why do you persist at doing this? My post was in response to someone else and you feel it necessary to jump in with the same old bafflegab. This is a public forum. Why do you not respond to my posting on a technical level instead of resorting to an ad hominem attack? I have tons of technical references to support my position. Clearly, you were too busy trying to frame an argument to actually read what I wrote. I only respond to portions I disagree with, Wes. Why can't you and I have a simple, point by point, technical discussion? "We" need to plot no such thing. You may have such a need; I do not. You, nor your cohorts, are likely to understand what's really happening until you take a look at the individual underlying currents that superpose to form the standing wave current which doesn't flow at all since its phase angle is fixed at zero degrees. Isn't a bunch of IEEE PhD's saying that "the lumped-circuit model fails in a standing-wave environment", enough evidence for you to consider that they know what they are talking about? -- 73, Cecil http://www.qsl.net/w5dxp |
#2
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On Fri, 10 Mar 2006 01:14:18 GMT, Cecil Moore wrote:
Wes Stewart wrote: Why do you persist at doing this? My post was in response to someone else and you feel it necessary to jump in with the same old bafflegab. This is a public forum. Why do you not respond to my posting on a technical level instead of resorting to an ad hominem attack? I have tons of technical references to support my position. Clearly, you were too busy trying to frame an argument to actually read what I wrote. I only respond to portions I disagree with, Wes. Why can't you and I have a simple, point by point, technical discussion? Which points? You are the master at selective editing. For example you stated: "Your graphs show standing wave current which doesn't flow...blah blah" When I show otherwise, snip, gone without reply. "We" need to plot no such thing. You may have such a need; I do not. You, nor your cohorts, are likely to understand what's really happening until you take a look at the individual underlying currents that superpose to form the standing wave current which doesn't flow at all since its phase angle is fixed at zero degrees. I have no "cohorts" here. This isn't the "Let's get Cecil" gang. Isn't a bunch of IEEE PhD's saying that "the lumped-circuit model fails in a standing-wave environment", enough evidence for you to consider that they know what they are talking about? I've worked with lots of PhD's. Hell I even had one working for me and his was in Nuclear Physics from Trinity College at Oxford. He was a lovely old guy, the quintessential Einstein type, who couldn't find his way to the men's room without directions. Another, younger one was so impressed with himself, it was impossible to have a conversation with him without him saying, "When I was working on my thesis..." Pass him in the hall and say, "Nice day today." He would reply, "Yes, it is but I remember a day back when I was working on my thesis..." Sorry, "A bunch of IEEE PhD's" impresses me less than a handful of the guys posting here. |
#3
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![]() "Wes Stewart" wrote in message ... On Fri, 10 Mar 2006 01:14:18 GMT, Cecil Moore wrote: Wes Stewart wrote: Why do you persist at doing this? My post was in response to someone else and you feel it necessary to jump in with the same old bafflegab. This is a public forum. Why do you not respond to my posting on a technical level instead of resorting to an ad hominem attack? I have tons of technical references to support my position. Clearly, you were too busy trying to frame an argument to actually read what I wrote. I only respond to portions I disagree with, Wes. Why can't you and I have a simple, point by point, technical discussion? Which points? You are the master at selective editing. For example you stated: "Your graphs show standing wave current which doesn't flow...blah blah" When I show otherwise, snip, gone without reply. "We" need to plot no such thing. You may have such a need; I do not. You, nor your cohorts, are likely to understand what's really happening until you take a look at the individual underlying currents that superpose to form the standing wave current which doesn't flow at all since its phase angle is fixed at zero degrees. I have no "cohorts" here. This isn't the "Let's get Cecil" gang. Isn't a bunch of IEEE PhD's saying that "the lumped-circuit model fails in a standing-wave environment", enough evidence for you to consider that they know what they are talking about? I've worked with lots of PhD's. Hell I even had one working for me and his was in Nuclear Physics from Trinity College at Oxford. He was a lovely old guy, the quintessential Einstein type, who couldn't find his way to the men's room without directions. Another, younger one was so impressed with himself, it was impossible to have a conversation with him without him saying, "When I was working on my thesis..." Pass him in the hall and say, "Nice day today." He would reply, "Yes, it is but I remember a day back when I was working on my thesis..." Sorry, "A bunch of IEEE PhD's" impresses me less than a handful of the guys posting here. Hi Wes The more I read your posts the more I like the way you think. Jerry |
#4
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Wes Stewart wrote:
Cecil Moore wrote: "Your graphs show standing wave current which doesn't flow...blah blah" When I show otherwise, snip, gone without reply. Sorry, I completely missed it. I'll go back and try to find it. Sorry, "A bunch of IEEE PhD's" impresses me less than a handful of the guys posting here. Have you looked at the articles on the web pages I posted? Here's a funny quote, not previous quoted from: http://www.ttr.com/corum/index.htm "What frequency did you get in step 5? ... Is the difference within engineering accuracy ... less than 5%? If the answer is yes, then you may confidently use lumped-element modeling. However, if the answer is no, then, from the halls of Valhalla, old Wotan, himself, is thundering out over the battlements, '#*@&%!! ... Thor, you dumdum! You CAN'T use lumped circuit modeling!' ... [The coil has standing waves and is behaving as a distributed resonator.]" In case you missed it, here's what Walter Maxwell had to say about the subject: "If an inductance is in series with a line that has reflections, the current will NOT be the same at both ends of the inductor." "Consequently, circuit analysis will not work when both forward and reflected currents are present in a lumped circuit." -- 73, Cecil http://www.qsl.net/w5dxp |
#5
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Cecil Moore wrote:
In case you missed it, here's what Walter Maxwell had to say about the subject: "If an inductance is in series with a line that has reflections, the current will NOT be the same at both ends of the inductor." "Consequently, circuit analysis will not work when both forward and reflected currents are present in a lumped circuit." Cecil, I really think you should let Walt speak for himself. You have a history of distorting facts and taking statements out of context, and may be discrediting Walt. Walt is too nice a person for me to stand by and let that happen. If anyone really thinks that as a stand-alone statement, it is not correct. I suspect he didn't get the full story or wasn't following a discussion closely, or you have snipped something out of context. It's very easy to take small areas out of context and make it seem like someone is saying something they are not. Any circuit analysis will work so long as the load impedances used in the analysis are the same as the load impedances presented at that point by an antenna. The behavior of any small two-terminal component REQUIRES currents to be essentially equal. It's only when the component has a third significant path to the outside world that currents can be unequal. If I have a small capacitor, current flowing in one lead is equal to current flowing out the other and the phase of each current is exactly equal. Same for an inductor. That's not a guess, that's a rule of how things always behave. I'm wondering if the real problem is some people spend too much time with transmission lines and antenna and not enough time with circuit components, and become rusty? In any event, you do enough damage to people's reputations Cecil. Please leave Walt alone. He will speak for himself if he likes. 73 Tom |
#6
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wrote:
Cecil Moore wrote: In case you missed it, here's what Walter Maxwell had to say about the subject: "If an inductance is in series with a line that has reflections, the current will NOT be the same at both ends of the inductor." "Consequently, circuit analysis will not work when both forward and reflected currents are present in a lumped circuit." Cecil, I really think you should let Walt speak for himself. Sorry, I don't care what you think. You and I (and Walt) know exactly who distorted the facts. If anyone really thinks that as a stand-alone statement, it is not correct. I suspect he didn't get the full story or wasn't following a discussion closely, or you have snipped something out of context. It's very easy to take small areas out of context and make it seem like someone is saying something they are not. Those are Walt's exact words, not mine. If you don't believe me, send him an email and ask him. The behavior of any small two-terminal component REQUIRES currents to be essentially equal. It's only when the component has a third significant path to the outside world that currents can be unequal. Wrong! Wrong! Wrong! Your lumped-circuit model presupposes that the currents are equal so you are begging the question. YOU CANNOT USE YOUR MODEL TO PROVE ITS OWN PRESUPPOSITIONS. I see you haven't yet read what Dr. Corum had to say on that subject. http://www.ttr.com/corum/index.htm If I have a small capacitor, current flowing in one lead is equal to current flowing out the other and the phase of each current is exactly equal. Same for an inductor. Sorry, that's just not true for inductors. In the real world, there is a traveling wave current delay through the coil that can easily be measured on the bench. That delay converts directly to a phase delay. You are simply mistaken, hoodwinked by your lumped-circuit model, which presupposes the proof of what you say above. You are once again, begging the question and assuming the proof without having proved anything. That's not a guess, that's a rule of how things always behave. BS, Tom. That's a rule from a model known to fail in the presence of standing waves. Models existing in your mind don't dictate reality. It is supposed to be just the opposite. I'm wondering if the real problem is some people spend too much time with transmission lines and antenna and not enough time with circuit components, and become rusty? The real problem is that you are looking for your keys under the streetlight instead of in the dark where you lost them. The real problem is that you are doing the same thing as the naive ham who tries to measure feedpoint impedance with an ohm-meter. The real problem is that you are using a tool known to fail under the conditions in which you are trying to use it. THE LUMPED-CIRCUIT MODEL FAILS IN THE PRESENCE OF STANDING WAVES! I know that. Walt knows that. Dr. Corum knows that. A number of lurkers on this newsgroup know that. Nikola Tesla obviously knew that in his 1897 patent application. In any event, you do enough damage to people's reputations Cecil. Please leave Walt alone. He will speak for himself if he likes. Please mind your own business. I have Walt's permission to quote his stuff. If he ever asks me to stop quoting him, I will. One wonders if your attitude would be different if Walt agreed with you? :-) -- 73, Cecil http://www.qsl.net/w5dxp |
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