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Equilibrium and Ham examinations
Cecil Moore wrote:
For exponents (HTML superscripts) some browsers convert c^2 to csup2/sup HTML. :-) That was c ^ 2 without the spaces. :-) -- 73, Cecil http://www.w5dxp.com |
Equilibrium and Ham examinations
Dave wrote:
This bull**** has nothing to do with ham radio. Exponents used in such terms as P = I^2R have nothing to do with ham radio? That's a really sad statement about the present technical level of amateur radio. -- 73, Cecil http://www.w5dxp.com |
Equilibrium and Ham examinations
"Cecil Moore" wrote in message ... Rectifier wrote: I am asking you: What if the sun put out nothing except EM waves. Would comets still have a tail or not? Are you talking about the ion tail or the dust tail? The dust tail is affected by EM; but the ion tail is affected only by magnetic forces. So a large part of the visible tail of the comet would still point away from the sun even if the sun emitted nothing but EM waves. EM waves possess momentum, apply radiation pressure to dust particles (matter), and have relativistic mass. -- 73, Cecil http://www.w5dxp.com That is correct. |
Equilibrium and Ham examinations
Rectifier wrote:
The word was not misspelled. According to dictionary.com, which quotes the American Heritage Dictionary, "traveling" and "travelling" are both accepted ways of spelling the word. Sorry, Thunderbird said it was misspelled. Guess I should add "travelling" to Thunderbird's dictionary. -- 73, Cecil http://www.w5dxp.com |
Equilibrium and Ham examinations
Rectifier wrote:
... so I may get some terminology wrong or not be able to explain it as well as I could before. However, discussions like these are interesting and stimulate thought and a desire to go back and review the subject. Yes, that is the important thing. I don't mind my spelling corrected, and I may mention the misspelling of another ... however, you have it right. To error is human ... Regards, JS |
Equilibrium and Ham examinations
Tom Ring wrote:
... To understand the situation, I would suggest that you start down the calculus road. The internet has to have tutorials on it. Differential equations look terribly obtuse, but they are an obtainable destination down that road if you choose to follow it. tom K0TAR My take on that is a bit different ... on "AMATEUR Radio" that is. In building antennas, tank ciruits, etc., I very seldom whip out a programmable scientific calculator and delve into the depths of the maths which allow them to preform/function/"work." A few times, I have just grabbed up some tubing/wire a variable condenser or two, and "eyeballed" the construction--past experience provided "ballpark" figures/placements/wiring, testing, trimming and adjusting got me the final result ... Mainly, I point this out so as not to "obsfucate" that layman, or discourage him ... the men who first started/awakened my interest in such things never gave any indication, to me, they had an understanding of calculus, only basic-math/algebra, and of course, geometry! Indeed, at least one passed away without ever expressing any real interest in learning it! However, in Arts pursuits, an understanding would be a real advantage ... Regards, JS |
Equilibrium and Ham examinations
On Thu, 18 Sep 2008 07:42:55 -0500, Cecil Moore
wrote: Jeff Liebermann wrote: Try again...would you believe light as 38 miles per hour? 38 miles per hour is the speed of light in that medium but not in a vacuum. You're still using vacuum tubes? Most of my equipment runs in a medium, not in a vacuum. Quiz: How fast do the electrons flow in a copper conductor? Hint: It's not the speed of light. Of course not, compared to photons, electrons are massive, capable of absorbing photons with ease. Well, to split hairs, electrons don't emit or absorb photons. The energy or momentum from or to a photon is absorbed or emitted and photons are either destroyed or created in the interaction in descrete quanta levels. However, unless I heat my copper wire to incandescence, it's is not going to emit or absorb any photons. I just wanted to point out that the speed of propagation through a medium is not the same as the speed of the particles involved in conduction. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Equilibrium and Ham examinations
On Thu, 18 Sep 2008 12:49:04 +0000, Dave wrote:
Cecil Moore wrote: Jeff Liebermann wrote: Is there a standard notation or style for arithmetic and exponentiation for usenet posting? I've been switching around using different styles almost at random over the years. For exponents (HTML superscripts) some browsers convert c^2 to csup2/sup HTML. That's the convention I use for exponents. Why don't you two get a room? This bull**** has nothing to do with ham radio. However, maybe if we ionized your hot air we could bounce some 70 cm off the cloud. I've always suspected that some hams hated math and other technical subjects. While it is conceivable that you could build a ham antenna without using math, I don't think the results would be optimal. There are also those that advocate converting ham radio from a technical hobby, to a sport, where the technical aspects are diminished to the point of extinction, and the operational exercises of contesting, DX, CW, and rag chewing are predominant. No math required. Perhaps the FCC could balkanize the ham bands into technical and non-technical sub-bands, where the clueless and those that still design, calculate, and build their own equipment can be seperated for their own safety. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Equilibrium and Ham examinations
I know books say a lot of things but do they explain WHY current
cannot flow thru the center? snip Art If you do the differential equations, it doesn't say why the center can't so much as why the skin does. Similar to gravitation and water flowing downhill vs uphill. My understanding was about molecular alignment and that the flow of electrons would be there first. Notice that stranded wire is often preferred for it's current handling ability even though solid is easier to terminate to and doesn't have the problem of discontinuities due to corrosion on many surfaces that rub together. This doesn't mean that eddy currents aren't there in hollow elements. Solid or stranded or hollow tubing, the eddy currents contribute to loss but don't contribute to radiation. Ejection of particles should lead to deterioration of the metal but if you were to coat the elements (with non-conductive and non-reactive coating) there would be no deterioration. It would also prevent rain static. I don't burden myself with paradigms to explain electromagnetic wave propagation in free space. It and Gravity do very well without my explanation. We know that the AC current in the antenna induces an electromagnetic wave is sufficient for my purpose. Unless I can find funding for renewed efforts... (wink nudge) |
Equilibrium and Ham examinations
Jeff Liebermann wrote:
Well, to split hairs, electrons don't emit or absorb photons. I was just quoting "QED", by Richard Feynman: "-Action #1: A photon goes from place to place." "-Action #2: An electron goes from place to place." "-Action #3: An electron emits or absorbs a photon." I'm sorry that Feynman was not precise enough for you. :-) -- 73, Cecil http://www.w5dxp.com |
Equilibrium and Ham examinations
Jeff Liebermann wrote:
Perhaps the FCC could balkanize the ham bands into technical and non-technical sub-bands, where the clueless and those that still design, calculate, and build their own equipment can be seperated for their own safety. 10-4 Gud Buddy! Didn't that already happen back in the 60's when they took 11m away from hams? -- 73, Cecil http://www.w5dxp.com |
Equilibrium and Ham examinations
On Sep 18, 1:08*am, "JB" wrote:
"Art Unwin" wrote in message ... On Sep 17, 2:26 pm, "JB" wrote: OK So nobody wants to talk about equilibrium or current flow on a radiator. Thats fine by me. Took a lot of posts to get to that point. JB I apologize I have been nailed to the cross so many times I tend to bundle things together. When I started I zeroed on equilibrium as a start because existing laws state that if a charge is moving on the outside of a radiator then there is movement on the inside of a radiator Now that is not in the books. Why is that? However discussion went away from the intent of the thread. equilibrium with respect to radiation. O well another try later Regards Art Consider that there is little difference in the performance of a solid radiator and hollow radiator. There are things about Electromagnetic Radiation that aren't discussed by Newton. Study classical antenna theory, then you will be on common ground with others that study antennas. The danger of concentrating on your own line of study so much is that you wind up out on a limb. I see this often when dealing with different terminology spawned of different paradigms, where similar circuits are redrawn and renamed by different engineering teams. This is nowhere more evident in Psychology and Philosophy, where insight springs from the conclusions derived from the limited experiences of an isolated group or individual. It is like the blind men describing an elephant when they have only one part in front of them. They each call the elephant something else based on their singular experience and arrive at logical conclusions that are false. The fact that we only have one lifetime to devote to all the pieces is indeed a limitation. Could well be but I have no alternative and am going my own way. Why should this disturb others? They could easily show me the error of my ways instead of taking up the cause against change We all know Newtons Laws ( some interprete in different ways) So we have a radiator upon which a charge rests there for ethere is no need for a opposing vector inside the radiator. Then we have a radiator that is not in equilibrium and thus we have a vector which according to the laws of Newton or equilibrium or what ever requires a responding vector inside the conductor. Inside the conductor there is no magnetic field nor the Foucalt current thus it is not radiating just spending copper losses. Put the apparatus in a vacuum and the current will take a less resistive route by producing an arc at the ends AWAY from the radiator. To me that sounds as perfect logic but there is no book that states it or the presence of the Foucalt current. That is not to say there are not a lot of explanations all of which are different so I go back to first principles and people get angry at the idea of change. Now the tide on this post has turned around on Cecil. Let me warn you that Cecil has outlasted this group several times to the tune of threads extending more than a thousand more than a few times over the last 20 years. One person who harasses him tries a lot of tactics on him including pointing out that his only difference he has with a dog is lipstickl but only the newbies respond to him unnowingly. Cecil will out last them all. Art * * *Back to the mowing --Well Art, there are some people out there that tend to boasting and jump on any opportunity. No, there is no arcing at the end of the elements. *The ends of a center fed dipole are a high impedance so there is high voltage there but as long as there are clean decent insulators there should be no trouble with that. With VERY HIGH power, *ionization may take place and there will be a glow off the ends. *The cubical Quad antenna was developed to combat that problem. *It utilizes a full wave loop fed directly. *Look also to the folded dipole.. Find out though that the current in the loop is the same in that there will be a high voltage node at the points 1/4 wave away from the feedpoint even though the wire goes continuously around and back. Certainly if you touched it there, you would fry yourself by being a path to ground just as you would with a classic dipole. These things are known and proven, unlike the quantum physics tangent the thread went off on. *It is possible that Quantum Physics is all true. But it is really just a construct to explain certain realities that aren't fully explained with other theories. *This should tell you that there is a better explanation out there but we don't have all the pieces. *It is certainly an avenue of research. * *It could just as well be something else entirely where all the questions are answered even better. Quantum physics isn't needed to build antennas. *Good luck in your studies. *There is a lot of misunderstanding about antennas. And you might have confusion about parts that the writer considered evident. Concepts that I have found burdensome, I tend to place into a box for later, more in-depth study and chose not to trust them or myself with hard conclusions, especially if practical experience won't support them. Well I disagree with you Quito was using a radiator that was not in a state of equilibriun ie a half wave format. As I have said earlier without equilibrium shows the charge in movement which requires a complimentary movement With the higher altitude Quito provided an alternative to placing the vector inside the conductor and the circuit took a different route. This was solved by using a full wave circuit in equilibrium that removed the arcing choice by suppling a continous route on the outside of the radiator. If the quad was divided into two bent dipoles it would still arc at the extremities because of the lower external pressure. Really this is a good example of the necessity of equilibrium in vector form where for equilibrium the circuit must be long enough or multiples there of to provide the allowance of repeatability of current flow ie. equal to the PERIOD length of the time varient frequency . I stated multiples because it reflects the movement of a pendulum where the occillation calcullation( formular) is the same as the oscillation applied to a radiator when in resonance. Thus the logic has evolved back to the starting point ala the arbitrary border used by Gauss. I slept to 11 oc this morning but it was not because of you I did to much mowing and there is still some left. If I just used the tractor I would surely die Best regards Art |
Equilibrium and Ham examinations
On Thu, 18 Sep 2008 06:59:35 -0700, John Smith
wrote: In building antennas, tank ciruits, etc., I very seldom whip out a programmable scientific calculator and delve into the depths of the maths which allow them to preform/function/"work." And what do you do when they don't work? Cut-n-try is a rather expensive way to build something that works. Given infinite time and materials, it will eventually result in a functional antenna. You could probably do that at HF frequencies where construction errors are about equal to calculation errors. However, don't try it at microwave frequencies. While it's possible to cut-n-try various microwave structures, it's messy, difficult, prone to error, and not very effective. The techniques used to build a coat hanger ground plane at VHF just are not going to work at X-band. The only way to get it close to right the first time is to calculate first, calculate again, have someone check the calculations, drink some wine, and check your calcs again. Then build it. A few times, I have just grabbed up some tubing/wire a variable condenser or two, and "eyeballed" the construction--past experience provided "ballpark" figures/placements/wiring, testing, trimming and adjusting got me the final result ... Yep. That will work at HF because the lower frequencies allow for much larger construction errors. Your antenna lengths could be off many cm and still work. Your xmitter can also tolerate a substantial VSWR and still be considered functional and useful. You match box could be grossly inefficient trying to match your constructed antenna, and work well enough. Now, try that at microwave frequencies, where every milliwatt is precious, where VSWR is too crude and reflection coefficient comes close to describing the ultimate goal of a perfect match, and where cm errors are disastrous. Some broadband antennas (helix and horn) are very forgiving and can be build fairly crudely. Others (stripline, phased arrays, cavity backed antennas, etc) have a higher Q and require more accuracy than the eyeball can provide. Mainly, I point this out so as not to "obsfucate" that layman, or discourage him ... the men who first started/awakened my interest in such things never gave any indication, to me, they had an understanding of calculus, only basic-math/algebra, and of course, geometry! Same here. My original mentors were operators first and technical types last. However, I saw the light (and the distinction) between amateur and professional when I went to college and saw that radio things were easier and better if they were calculated (and understood) first. I have several humorous examples of hams operating in a professional environment (engineering lab at a radio manufactory) and failing miserably using cut-n-try methods popularized by ham radio. Indeed, at least one passed away without ever expressing any real interest in learning it! There are suspicions that math may hasten one's demise. Perhaps he tried to do a calculation before he died? However, in Arts pursuits, an understanding would be a real advantage ... Agreed. Once he gets that understanding, he can work on the communications problem. Perhaps publish his works. After solving all that, he can possibly consider the applications and implementations. The twisted road towards technical nirvana is littered with the wreckage of failed great ideas. Incidentally, I was also going to bash your suggestion of ignoring patents. Might as well add that to my rant. Patent are confusing. Many of them are totally bogus. It's difficult to recognize the difference. However, at the bottom of every garbage dumpster lies a diamond. You have to sift through a huge amount of garbage in order to find the gem, but it's worth it. Just because a typical patent search returns bogus patents, doesn't mean you should ignore them. Most technical patents are legitimate and worth inspecting. If you want to know exactly how something works, the patents are the place to start. I haven't had time to look at the quantum comb filter antenna thing, but plan to do so eventually. During the dot.com heyday, I was doing sanity checks and technological assessments for a venture capitalist. Many business plans had technical problems. Some were based on bogus patents. Some held conflicting patents. Identifying these was more than the VC's staff could handle. I did fairly well, but still managed to miss a few. Anyway, sifting through patents was part of the exercise and a great learning experience. Often, a patent looks legitimate, but has a fatal flaw or omission in the middle of the claims. It's not easy. If you have the patience, it's possible to find these. Also, I assembled a small list of tech patents that appear to be bogus. I was going to post the list on the web but my attorney advised against it. Even holders of bogus patents can sue for damages. Oh well. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Equilibrium and Ham examinations
On Thu, 18 Sep 2008 11:34:23 -0500, Cecil Moore
wrote: Jeff Liebermann wrote: Perhaps the FCC could balkanize the ham bands into technical and non-technical sub-bands, where the clueless and those that still design, calculate, and build their own equipment can be seperated for their own safety. 10-4 Gud Buddy! Didn't that already happen back in the 60's when they took 11m away from hams? Yep. Also the bottom of the 1296MHz band went to GPS because hams couldn't do anything useful with it. Also most of the 220MHz band went to ACSSB and inland waterways because it was under-utilized and because the ARRL couldn't get it together on no-code licensing. We almost lost the 2.4GHz band because the ARRL was going to demand priority over unlicensed wi-fi operation, but that was averted when the ARRL directors received a rare dose of common sense from unknown sources. Unfortunately, the common justification these days is that ham radio is a service hobby. When was the last time that ham radio advanced the state of the art? I have some examples, but they're sufficiently obscure that none would be sufficient to justify ham radios continued existence. There is some logic in using the ham bands as a proving ground for new technologies. Metricom did exactly that, but rapidly switched to commerical operation. It seems that such advanced experimentation is discouraged by Part 97. Most of the progress today is in HF digital modes. These have their own sub-bands by convention. Also QRP operation, spacecom, CW, and weak signal sub-bands. Various nets also operate on specific frequencies. It wouldn't be much of a stretch to unofficially allocate a sub-band to the technically challenged, such as the old Novice class sub-bands. Personally, I've suggested that CB'ers and Free Banders be issued complimentary ham licenses for 10 meters and let them fight it out. I'll be betting that the CB'ers win. Most of the "new hams" these days are former CB'ers. With a few notable exceptions, most are quite nice, but also technically lacking. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Equilibrium and Ham examinations
On Sep 18, 7:48*am, Tom Ring wrote:
Art Unwin wrote: On Sep 17, 8:52 pm, Tom Ring wrote: Art Unwin wrote: I know books say a lot of things but do they explain WHY current cannot flow thru the center? snip Art If you do the differential equations, it doesn't say why the center can't so much as why the skin does. *Similar to gravitation and water flowing downhill vs uphill. *I'll go into detail if you can't figure it out. *Or not. tom K0TAR Please do. I would love to see your take on it. I am gratified that somebody is tackling the problem hopefully in laymans language so all can benefit. Possibly you could start another thread as this one is greatly contaminated I can then respond on my take of the matter and hopefully the flaw will be exposed. Regards Art I did not mean to imply I would explain the diff eqs. *That would currently be a lost cause on you, because I am sure that I couldn't put it in "layman's terms" - you need the math to understand it. *I meant that I would explain why the 2 situations were similar, or not explain, depending upon my mood. To understand the situation, I would suggest that you start down the calculus road. *The internet has to have tutorials on it. *Differential equations look terribly obtuse, but they are an obtainable destination down that road if you choose to follow it. tom K0TAR Tom but I have put in terms of the layman so that should be paradise to those skilled in mathematicWhen the good Doctor frm MIT provided the mathemartic showing the correctness of logic I proposed with respect to Gauss and Maxwellk mathematics as a route of viability was rejected by all. That really needs exposure to the group as it is the foundation of radiation. The computor is a wonderful thing but if an arrow is pointed in the wrong direction it then becmes useless. Nearly finished the mowing Art |
Equilibrium and Ham examinations
On Thu, 18 Sep 2008 16:26:18 GMT, "JB" wrote:
We know that the AC current in the antenna induces an electromagnetic wave is sufficient for my purpose. Unless I can find funding for renewed efforts... (wink nudge) Funding is easy these days. All you need is an anti-terrorism or disaster link. For example: - Use of HF antennas for airport security. - Antenna design optimized for disaster services. - Survivable antenna design and construction. While these topics are contrived, there has been considerable rethinking of the basics in order to enhance survivability, tampering, security, terrorist activities, general mayhem, and other post-911 buzzwords. I'm not sure this extends to basic concepts, but it's possible. Something like: - Re-evaluating E-M concepts in a post 911 world. - Survey of antenna technology for optimum disaster communications. You will need to use your imagination because all the obvious studies have already been taken. Perhaps combining everything into: - The effects of global warming, terrorism, economic collapse, and natural disasters on antenna technology. Try to emphasize the positive aspects such as the improved HF antenna grounding provided by rising sea levels. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Equilibrium and Ham examinations
Yep. Also the bottom of the 1296MHz band went to GPS because hams couldn't do anything useful with it. Also most of the 220MHz band went to ACSSB and inland waterways because it was under-utilized and because the ARRL couldn't get it together on no-code licensing. We almost lost the 2.4GHz band because the ARRL was going to demand priority over unlicensed wi-fi operation, but that was averted when the ARRL directors received a rare dose of common sense from unknown sources. Yer crocked! 1296 is fully utilized here and so was 220. People like YOU who underutilized it and TOLD everyone it was underutilized are to blame for US losing it!! Did you get a Ham license just so you could use 802.11/g on channel 13? Personally, I've suggested that CB'ers and Free Banders be issued complimentary ham licenses for 10 meters and let them fight it out. I'll be betting that the CB'ers win. Most of the "new hams" these days are former CB'ers. With a few notable exceptions, most are quite nice, but also technically lacking. Bendict Arnold! Anarchist!! Anti-Ham!! Your web domain says it all!! -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Equilibrium and Ham examinations
On Sep 18, 12:58*pm, Jeff Liebermann wrote:
On Thu, 18 Sep 2008 16:26:18 GMT, "JB" wrote: We know that the AC current in the antenna induces an electromagnetic wave is sufficient for my purpose. *Unless I can find funding for renewed efforts... *(wink nudge) Funding is easy these days. *All you need is an anti-terrorism or disaster link. *For example: - Use of HF antennas for airport security. - Antenna design optimized for disaster services. - Survivable antenna design and construction. While these topics are contrived, there has been considerable rethinking of the basics in order to enhance survivability, tampering, security, terrorist activities, general mayhem, and other post-911 buzzwords. *I'm not sure this extends to basic concepts, but it's possible. *Something like: - Re-evaluating E-M concepts in a post 911 world. - Survey of antenna technology for optimum disaster communications. You will need to use your imagination because all the obvious studies have already been taken. *Perhaps combining everything into: - The effects of global warming, terrorism, economic collapse, and * natural disasters on antenna technology. Try to emphasize the positive aspects such as the improved HF antenna grounding provided by rising sea levels. -- Jeff Liebermann * * 150 Felker St #D * *http://www.LearnByDestroying.com Santa Cruz CA 95060http://802.11junk.com Skype: JeffLiebermann * * AE6KS * *831-336-2558 Jeff you are a man after my own heart in your phillosophy . If I had you exposure of mathematics to replace what I have lost I would instantly do what the good doctor did and show the correllation of Maxwells laws to those of Gaussian static laws when made dynamic ie the addition of a radiator and a time varying field inside the existing arbitrary boundary. What the doctor showed has been totally rejected by this group without I might had evidence to the contrary Just....well....because. This is a throw back to the initiation of mathematics where the Universe is founded on Equilibrium. A pendulum when made long enough becomes sensative to changes in equilibrium in a similar way to the action of a super conductor Mathematics started with a balance exhib iting the ultimate of equilibrium and the mathematician invented "nothing" by placing both weights on one side of a fulcrum. The long pendulum shows that sdame point when an eclipse occurrs where the equilibrium is momentarily disturbed as its boundaries are momentarily severed. Now we are pushing those same limits with superconductivity where laws such as V =IR become unmathomabble. It is the same with antennas where all can realize that equilibrium tho fragile with respect to the term stable will provide maximum radiation but without resistance it is an imaginary term. Quadratics shows two terms show up where one is imaginary ala zero resistance so one moves to the other answer anti resonance which is high knowing at the same time one can extend the length of the wire( number of periods) to produce the sensitivity of the extra long pendulum which in mathematics follows the same laws. I use that same thinking because it is part of a universal laws. Thus I extend the length of wire used and at the same time balance the winding directions such that lumped loads are added such that the impedance and thus resonance goes down as the number of wavelength goes up. Now I apply that same arrangement to antenna programs that have free reign to modify the arrangement according to the laws of Maxell based on equilibrium and the final version of the four forces plus the particles ala the standard model. The computor program which is designed around the standard model which was modified to suit the present planar antenna of today is overjoyed for being used for its initial use confirmes the arrangement produces above. As a check the same arrangement is supplied to a nec4 set up controlled by a academic and it againl passed the check. Equilibrium cannot be discarded and all of the masters stipulate that as the founding condition, yet the present world has rejected it in favour of a computor Shame Shame Shame. Now I finish off the mowing Art Unwin ...KB9MZ...........xg Art Unwin KB9MZ....xg |
Equilibrium and Ham examinations
Jeff Liebermann wrote:
And what do you do when they don't work? Cut-n-try is a rather expensive way to build something that works. Given infinite time and materials, it will eventually result in a functional antenna. You could probably do that at HF frequencies where construction errors are about equal to calculation errors. However, don't try it at microwave frequencies. While it's possible to cut-n-try various microwave structures, it's messy, difficult, prone to error, and not very effective. The techniques used to build a coat hanger ground plane at VHF just are not going to work at X-band. Well, ya', an adjustable whip(s) is good, especially with the cost of copper and the pain in "resoldering your prunings." LOL The only way to get it close to right the first time is to calculate first, calculate again, have someone check the calculations, drink some wine, and check your calcs again. Then build it. You have wine? Why didn't you say so, that changes everything: 1) Put antennas away. 2) Have a glass of wine and contemplate the design/construction. 3) Repeat 2) until ALL wine is gone. 4) Take a nap. 5) Now get the antenna(s) back out and begin work ... LOL A few times, I have just grabbed up some tubing/wire a variable condenser or two, and "eyeballed" the construction--past experience provided "ballpark" figures/placements/wiring, testing, trimming and adjusting got me the final result ... Yep. That will work at HF because the lower frequencies allow for much larger construction errors. Your antenna lengths could be off many cm and still work. Your xmitter can also tolerate a substantial VSWR and still be considered functional and useful. You match box could be grossly inefficient trying to match your constructed antenna, and work well enough. Now, try that at microwave frequencies, where every milliwatt is precious, where VSWR is too crude and reflection coefficient comes close to describing the ultimate goal of a perfect match, and where cm errors are disastrous. Some broadband antennas (helix and horn) are very forgiving and can be build fairly crudely. Others (stripline, phased arrays, cavity backed antennas, etc) have a higher Q and require more accuracy than the eyeball can provide. Or, to summarize, the more complex the antenna, the more meters you are going to need ... LOL Mainly, I point this out so as not to "obsfucate" that layman, or discourage him ... the men who first started/awakened my interest in such things never gave any indication, to me, they had an understanding of calculus, only basic-math/algebra, and of course, geometry! Same here. My original mentors were operators first and technical types last. However, I saw the light (and the distinction) between amateur and professional when I went to college and saw that radio things were easier and better if they were calculated (and understood) first. I have several humorous examples of hams operating in a professional environment (engineering lab at a radio manufactory) and failing miserably using cut-n-try methods popularized by ham radio. Indeed, mine drank beer too! grin Indeed, at least one passed away without ever expressing any real interest in learning it! There are suspicions that math may hasten one's demise. Perhaps he tried to do a calculation before he died? If away from my laptop, the programmable calculator is always in my pocket! (I mean, my gawd man, I have space invaders on it!) straight-face ... Also, I assembled a small list of tech patents that appear to be bogus. I was going to post the list on the web but my attorney advised against it. Even holders of bogus patents can sue for damages. Oh well. .... some patents are NOT what they used to be ... but then, there has always been some suspicion about the politics involved, not to mention courts ... Regards, JS |
Equilibrium and Ham examinations
Art Unwin wrote:
For instance, equilibrium demands that charges do not move laterally along an antenna when in equilibrium Without equilibrium charges do move along the surface of a radiator and Newtons law of parity demands that charges are moving thru the CENTER of the radiator thus encoundering just copper losses. Hi Art, Which one was Newton's Law of Parity again? I'm drawing a blank. Google had this: Your search - "Newton's law of parity" - did not match any documents. 73, ac6xg |
Equilibrium and Ham examinations
On Sep 18, 2:14*pm, John Smith wrote:
Jeff Liebermann wrote: And what do you do when they don't work? *Cut-n-try is a rather expensive way to build something that works. *Given infinite time and materials, it will eventually result in a functional antenna. *You could probably do that at HF frequencies where construction errors are about equal to calculation errors. *However, don't try it at microwave frequencies. *While it's possible to cut-n-try various microwave structures, it's messy, difficult, prone to error, and not very effective. *The techniques used to build a coat hanger ground plane at VHF just are not going to work at X-band. Well, ya', an adjustable whip(s) is good, especially with the cost of copper and the pain in "resoldering your prunings." *LOL The only way to get it close to right the first time is to calculate first, calculate again, have someone check the calculations, drink some wine, and check your calcs again. *Then build it. You have wine? *Why didn't you say so, that changes everything: 1) Put antennas away. 2) Have a glass of wine and contemplate the design/construction. 3) Repeat 2) until ALL wine is gone. 4) Take a nap. 5) Now get the antenna(s) back out and begin work ... LOL A few times, I have just grabbed up some tubing/wire a variable condenser or two, and "eyeballed" the construction--past experience provided "ballpark" figures/placements/wiring, testing, trimming and adjusting got me the final result ... Yep. *That will work at HF because the lower frequencies allow for much larger construction errors. *Your antenna lengths could be off many cm and still work. *Your xmitter can also tolerate a substantial VSWR and still be considered functional and useful. *You match box could be grossly inefficient trying to match your constructed antenna, and work well enough. *Now, try that at microwave frequencies, where every milliwatt is precious, where VSWR is too crude and reflection coefficient comes close to describing the ultimate goal of a perfect match, and where cm errors are disastrous. *Some broadband antennas (helix and horn) are very forgiving and can be build fairly crudely. Others (stripline, phased arrays, cavity backed antennas, etc) have a higher Q and require more accuracy than the eyeball can provide. Or, to summarize, the more complex the antenna, the more meters you are going to need ... LOL Mainly, I point this out so as not to "obsfucate" that layman, or discourage him ... the men who first started/awakened my interest in such things never gave any indication, to me, they had an understanding of calculus, only basic-math/algebra, and of course, geometry! Same here. *My original mentors were operators first and technical types last. *However, I saw the light (and the distinction) between amateur and professional when I went to college and saw that radio things were easier and better if they were calculated (and understood) first. *I have several humorous examples of hams operating in a professional environment (engineering lab at a radio manufactory) and failing miserably using cut-n-try methods popularized by ham radio. Indeed, mine drank beer too! *grin Indeed, at least one passed away without ever expressing any real interest in learning it! There are suspicions that math may hasten one's demise. *Perhaps he tried to do a calculation before he died? If away from my laptop, the programmable calculator is always in my pocket! (I mean, my gawd man, I have space invaders on it!) *straight-face * ... Also, I assembled a small list of tech patents that appear to be bogus. *I was going to post the list on the web but my attorney advised against it. *Even holders of bogus patents can sue for damages. *Oh well. ... some patents are NOT what they used to be ... but then, there has always been some suspicion about the politics involved, not to mention courts ... Regards, JS JS Mathematics is founded on the proposition of zero means nothing ONLY if you ignore the presence of the weak force. Thus mathematic has contaminated that which is the "equal" sign which then is misused without the assumption of the underlying condition You can cancell the effects of gravity but it is a lot different to canceling the weak force. Put scales on a bench to oppose gravity does nothing to neutralise the weak force Thus in mathematics you can obtain negative answers which is the measure of the weak force which is contradictory to the "term" nothing in celestial terms but possibly is O.K. in polotics The CERN project is based on the collision of particles of the same polarity but without the constraints of sideways movement but the electron is much smaller than the area taken by an electron so to my mind there is no collision only contra or lamina flow UNLESs the particles are of different polarities which some theorise as equating to the big bang.! Art Have fun Art |
Equilibrium and Ham examinations
Jeff Liebermann wrote:
[stuff] Forgot to mention, on those "real complex antennas", you are going to need more wine too! ;-) Just one more of those laws that Murphy forgot to mention. Regards, JS |
Equilibrium and Ham examinations
On Sep 18, 2:25*pm, Jim Kelley wrote:
Art Unwin wrote: For instance, equilibrium demands that charges do not move laterally along an antenna when in equilibrium Without equilibrium charges do move along the surface of a radiator and Newtons law of parity demands that charges are moving thru the *CENTER of the radiator thus encoundering just copper losses. Hi Art, Which one was Newton's Law of Parity again? *I'm drawing a blank. Google had this: Your search - "Newton's law of parity" - did not match any documents. 73, ac6xg I have been accused often in the using of the wrong term In the case of Newtons law as action creates reaction or similar. Then somebody mentioned the law of parity which I considered as being on par with what Newton said Now another poster mentioned that parity described a farming practice which also featured the pursuit of balance and parity with respect to prices. Thus when the term parity was used I thought that was a regrinding of the english language which I am now exposed to. I now remove the association of parity in the Laws as stated by Newton who lived in the UK and not in the USA. Best regards Art Unwin KB9MZ.......xg |
Equilibrium and Ham examinations
On Sep 18, 2:47*pm, John Smith wrote:
Jeff Liebermann wrote: [stuff] Forgot to mention, on those "real complex antennas", you are going to need more wine too! *;-) Just one more of those laws that Murphy forgot to mention. Regards, JS JS You know the saying that when one door closes another opens. In my case starvation of oxogen to the brain was momentary such that only the lines of communication withered. Thus nothing was left to provide communication between the different store houses of knowledge. Due to experience the lines of communication of most people reflect the motorways of New youk where the accumulation of intersections allow misdirection of communication or the memory of where one was originally going! Over a period of years where I concentrated on antennas as a method of rehab those missing communication lines were re generated in reflection of my new experience as one would measure the power of the growth of a babies brain. Thus my concentration on a niche form of study is not impaired by the traffic jams of the past which are now just decaying wreckage. Maybe the same is happening with Hawkings. Ofcouse that leaves an opening for Dave that the decay extended to the store houses of knowledge! My goodness isn't this thread getting deep? Best regards Art |
Equilibrium and Ham examinations
Art Unwin wrote:
... JS You know the saying that when one door closes another opens. In my case starvation of oxogen to the brain was momentary such that only the lines of communication withered. Thus nothing was left to provide communication between the different store houses of knowledge. Due to experience the lines of communication of most people reflect the motorways of New youk where the accumulation of intersections allow misdirection of communication or the memory of where one was originally going! Over a period of years where I concentrated on antennas as a method of rehab those missing communication lines were re generated in reflection of my new experience as one would measure the power of the growth of a babies brain. Thus my concentration on a niche form of study is not impaired by the traffic jams of the past which are now just decaying wreckage. Maybe the same is happening with Hawkings. Ofcouse that leaves an opening for Dave that the decay extended to the store houses of knowledge! My goodness isn't this thread getting deep? Best regards Art Yes Art, it is getting deep ... sound-of-hip-waders-being-pulled-on ;-) Regards, JS |
Equilibrium and Ham examinations
On Thu, 18 Sep 2008 12:55:59 -0700 (PDT), Art Unwin
wrote: I now remove the association of parity in the Laws as stated by Newton who lived in the UK and not in the USA. Yep. Newton's Laws of Motion are different on this side of the pond. 1. A particle will stay at rest or continue at a constant velocity unless acted upon by revisionist politics, traffic laws, zoning restrictions, local ordinances, or erroneous navigation information. 2. The net force on anything is equal to size of the politically motivated masses multiplied by the sum total their campaign contributions. 3. Every action has an equally reactionary opposition. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Equilibrium and Ham examinations
On Sep 18, 12:58*pm, Jeff Liebermann wrote:
On Thu, 18 Sep 2008 16:26:18 GMT, "JB" wrote: We know that the AC current in the antenna induces an electromagnetic wave is sufficient for my purpose. *Unless I can find funding for renewed efforts... *(wink nudge) Funding is easy these days. *All you need is an anti-terrorism or disaster link. *For example: - Use of HF antennas for airport security. - Antenna design optimized for disaster services. - Survivable antenna design and construction. While these topics are contrived, there has been considerable rethinking of the basics in order to enhance survivability, tampering, security, terrorist activities, general mayhem, and other post-911 buzzwords. *I'm not sure this extends to basic concepts, but it's possible. *Something like: - Re-evaluating E-M concepts in a post 911 world. - Survey of antenna technology for optimum disaster communications. You will need to use your imagination because all the obvious studies have already been taken. *Perhaps combining everything into: - The effects of global warming, terrorism, economic collapse, and * natural disasters on antenna technology. Try to emphasize the positive aspects such as the improved HF antenna grounding provided by rising sea levels. -- Jeff Liebermann * * 150 Felker St #D * *http://www.LearnByDestroying.com Santa Cruz CA 95060http://802.11junk.com Skype: JeffLiebermann * * AE6KS * *831-336-2558 Jeff if you have everything placed before you your enthuseasm will wain. There is nothing wrong in exactly following in MY footsteps you have your own bag of choices by not being a follower which enables you to challenge each step of logic. Fortunately in my case it was the foundation on which I built that was the subject of challengr despite evidence opresented to the contrary The foundation upon which everything rest is that the supposition of making Gaussian law of statics equal to the dynamic field of Maxwell only requires the addition of a radiator and a time varying field such that both are equal in physical and mathematical form, from which point the details offered provide all the relavent points of logic. This group mainly of electrical engineers have been brought up on the idea that statics are totally divorced from the mechanics of the electrical curriculum to the rejection of particle mechanics and towards the idea that sciences all have diifferent laws to each other. Scientists understand this but authors have not got to the stage of placing those findings in books which are initially provided by followers of science in the hope that some will carry the flag forward instead of concentration on the accumulation of wealth. If they can't read it in a book then it is not believable the same way as a scientific paper will not be accepted that do not prevail on previous thoughts. Initial thought is thus rejected by the education of today. Academia will never accept anything that is not received approval from their peers. Thus without dragging them forcibly into the acception of change no change will occur., where as, your expertise in mathematics can test the logic to its limits which defy opposition Best regards Art Unwin KB9MZ.........xg |
Equilibrium and Ham examinations
On Thu, 18 Sep 2008 18:09:57 GMT, "JB" wrote:
Yep. Also the bottom of the 1296MHz band went to GPS because hams couldn't do anything useful with it. Also most of the 220MHz band went to ACSSB and inland waterways because it was under-utilized and because the ARRL couldn't get it together on no-code licensing. We almost lost the 2.4GHz band because the ARRL was going to demand priority over unlicensed wi-fi operation, but that was averted when the ARRL directors received a rare dose of common sense from unknown sources. Yer crocked! 1296 is fully utilized here and so was 220. People like YOU who underutilized it and TOLD everyone it was underutilized are to blame for US losing it!! Did you get a Ham license just so you could use 802.11/g on channel 13? Been licensed since about 1964. There was about a 7 year period where I let my license lapse. Hmmm... I should probably let it lapse again as I was profitable, happy, and optimistic during those 7 years. About 8 ago, I setup several scanners and a computah to run long term statistics on channel utiliziation for a variety of services. For fun, I threw in some local VHF and UHF repeaters. For 14 daytime hours (I used 6am to 8pm) median utilization on public safety frequencies ran about 20%. Somewhat less for various shared commerical repeaters. However, of the 5 or so ham repeaters I monitored, utilization was well below 1% (less than 1.5hrs per day). I didn't bother to do any 1.2GHz repeaters, but I'll guess from one that I have in my scanner, it's probably even lower. I had no way to count users per channel per day, but if I did it manually, I suspect ham radio would also be scraping bottom. Many ham repeaters have only one user. For what it's worth, I consider myself party responsible for educating at least one ARRL director on the realities of the FCC balancing the 300 million wi-fi users against perhaps a handfull of hams on 2.4GHz. I don't use Channel 13 for Wi-Fi. It's an unlucky number (and not legal in the US). Personally, I've suggested that CB'ers and Free Banders be issued complimentary ham licenses for 10 meters and let them fight it out. I'll be betting that the CB'ers win. Most of the "new hams" these days are former CB'ers. With a few notable exceptions, most are quite nice, but also technically lacking. Bendict Arnold! Anarchist!! Anti-Ham!! Your web domain says it all!! Guilty as charged. If I can't be a part of the solution, I'll become part of the problem. Incidentally, the LearnByDestroying.com has nothing to do with ham radio. A college I attended has the motto "Learn by Doing". http://en.wikipedia.org/wiki/California_Polytechnic_State_University That morphed into "Learn By Destroying" which seemed to be the practice in the engineering department. Since graduating with a rather substantial damage fee, I have adopted it as my personal motto. If you haven't destroyed and later repaired it, you don't understand how it works. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Equilibrium and Ham examinations
On Thu, 18 Sep 2008 12:14:31 -0700, John Smith
wrote: Well, ya', an adjustable whip(s) is good, especially with the cost of copper and the pain in "resoldering your prunings." LOL Incidentally, one of the tricks I learned (the hard way) was to replace the mobile whip antenna with a piece of copper electrical wire. Then cut it to length, tune, optimize, test and whatever. Once the optimum length is established, replace the copper wire antenna with the real stainless whip, cut to the exact same length. You have wine? Why didn't you say so, that changes everything: The antenna transfer function of wine is highly exponential and very non-linear. A little wine will produce a superior antenna. However, incremental increases in wine dosage will tend to have lesser effects. At some threshold, additional can cause a substantial drop in performance. It may even go negative. Think equilibrium. Or, to summarize, the more complex the antenna, the more meters you are going to need ... LOL Kinda reminds me of a former tech. All day, he would spend his time working with the latest state of the art test equipment in the lab. After hours, he would drag out his ham radio, and tune the xmitter to maximum using a light bulb dummy load. Attempts to convince him that the company test equipment might be useful for dealing with his radios were futile. If away from my laptop, the programmable calculator is always in my pocket! (I mean, my gawd man, I have space invaders on it!) straight-face That doesn't leave much room for the pocket protector. I collect HP calculators. There are numerous calculators scattered around the office and house. No need to drag a calculator around. ... some patents are NOT what they used to be ... but then, there has always been some suspicion about the politics involved, not to mention courts ... There's plenty wrong with patents that I don't wanna get into. Suffice to say that it's very helpful to understand something about patents before trying to create one. I'm just suggesting that you make the effort to read patents. Groan. I decide to stay home today to recover from my home cooking. Outside, PG&E (the power company) and the local tree service just arrived. There goes my power... -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Equilibrium and Ham examinations
"joe" wrote in message ... 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. thats why they put those plastic plugs on elements, to keep the magical mystery dielectric particles from falling off instead of going back up the middle... if you ever lose the plastic caps you will notice the antenna starts leaking and the particles pileup in your yard making a real mess. |
Equilibrium and Ham examinations
"Jeff Liebermann" wrote in message ... Good luck. Let me know when you produce some logic, equations, or numbers. don't hold your breath, he hasn't produced anything logical and definitely no equations for anything he has said. |
Equilibrium and Ham examinations
On Thu, 18 Sep 2008 22:04:25 GMT, "Dave" wrote:
"Jeff Liebermann" wrote in message .. . Good luck. Let me know when you produce some logic, equations, or numbers. don't hold your breath, he hasn't produced anything logical and definitely no equations for anything he has said. Not a problem. Neither have I. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Equilibrium and Ham examinations
On Sep 18, 4:51*pm, Jeff Liebermann wrote:
On Thu, 18 Sep 2008 12:14:31 -0700, John Smith wrote: Well, ya', an adjustable whip(s) is good, especially with the cost of copper and the pain in "resoldering your prunings." *LOL Incidentally, one of the tricks I learned (the hard way) was to replace the mobile whip antenna with a piece of copper electrical wire. *Then cut it to length, tune, optimize, test and whatever. *Once the optimum length is established, replace the copper wire antenna with the real stainless whip, cut to the exact same length. You have wine? *Why didn't you say so, that changes everything: The antenna transfer function of wine is highly exponential and very non-linear. *A little wine will produce a superior antenna. *However, incremental increases in wine dosage will tend to have lesser effects. At some threshold, additional can cause a substantial drop in performance. *It may even go negative. *Think equilibrium. Or, to summarize, the more complex the antenna, the more meters you are going to need ... LOL Kinda reminds me of a former tech. *All day, he would spend his time working with the latest state of the art test equipment in the lab. After hours, he would drag out his ham radio, and tune the xmitter to maximum using a light bulb dummy load. *Attempts to convince him that the company test equipment might be useful for dealing with his radios were futile. If away from my laptop, the programmable calculator is always in my pocket! (I mean, my gawd man, I have space invaders on it!) *straight-face That doesn't leave much room for the pocket protector. *I collect HP calculators. *There are numerous calculators scattered around the office and house. *No need to drag a calculator around. ... some patents are NOT what they used to be ... but then, there has always been some suspicion about the politics involved, not to mention courts ... There's plenty wrong with patents that I don't wanna get into. Suffice to say that it's very helpful to understand something about patents before trying to create one. *I'm just suggesting that you make the effort to read patents. Groan. *I decide to stay home today to recover from my home cooking. Outside, PG&E (the power company) and the local tree service just arrived. *There goes my power... -- Jeff Liebermann * * 150 Felker St #D * *http://www.LearnByDestroying.com Santa Cruz CA 95060http://802.11junk.com Skype: JeffLiebermann * * AE6KS * *831-336-2558 Jeff we all make mistakes by over estimating ones ability In making one of my antennas I made a last minuit change just in time before I finished the antenna It was some weeks before that antenna was tested on the air in Australia That test proved that reprocity with respect to radiation is not a given!. I had neutralised the weak force such that particles could arrive but not depart! Yes it was an error on my part but it didn't rule out the value of experimentationj. Has anybody got a use for such an antenna?. This error in many ways provided proof that the trail I followed was coirrect. This is why I have delayed the sending of a antenna to AC6XG as the correction took over some of my free time. But Jim understands what happened not necessarily why. as he does have trust and an open mind as well as my respect. When I supplied an antenna to the U of I I gave them a sample of the same antenna in Australia because of their treatment towards me and comments made in advance of getting the antenna. Thus I gave them exactly what they expected to get based on pre examine comments similar to those of this group He who laughs last laughs longer and forever. Something like getting a bunch of wire with lip stick all over it Best regards Art Unwin....KB9MZ.......xg |
Equilibrium and Ham examinations
On Sep 18, 4:58*pm, "Dave" wrote:
"joe" wrote in ... 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. thats why they put those plastic plugs on elements, to keep the magical mystery dielectric particles from falling off instead of going back up the middle... if you ever lose the plastic caps you will notice the antenna starts leaking and the particles pileup in your yard making a real mess. If the inside is covered with an eddy current field the particle cannot get to the aluminum which debunks the idea that the electron can penetrate evreything. Forgeting the fact that it is searching for a diamagnetic surface to rest upon. The same situyation is repeated inside a wave guide. Do you think I could put "Doc' with my name to impress people? Art Unwin...KB9MZ |
Equilibrium and Ham examinations
Dave wrote:
... don't hold your breath, he hasn't produced anything logical and definitely no equations for anything he has said. Now let me analyze this and see ... 1) He is dealing with matters/effects/theories/speculations which universities/physicists/scholars/mathematician/theorists/amateurs/etc. are working/speculating/experimenting on. 2) Usually actions/effects/affects/phenomenon are observed before it even occurs to anyone to design an equation or formula about it. 3) Some speculations will, obviously, be incorrect or partially correct and need rethinking, or scraped and new ones advanced. 4) Etc., etc. Nope, you are quite correct ... he hasn't. However, to some, the reason(s) will be quite obvious; for others, it may take a bit longer ... Regards, JS |
Equilibrium and Ham examinations
On Sep 18, 5:04*pm, "Dave" wrote:
"Jeff Liebermann" wrote in message ... Good luck. *Let me know when you produce some logic, equations, or numbers. don't hold your breath, he hasn't produced anything logical and definitely no equations for anything he has said. Oh David emotion has got such a hold on you that you can't think straight. In one of the management classes I took they said if an employee can not be calmed always protect the path to exit. Medics say that anger or emotion can shut down the route to the house of logic in the human brain such that logic cannot come into being. Seams like the human brain is subdivided into physical block of knoweledge This explains why a baby learnes to walk quicker than a grown man with experience and tangled information routes.. You need a 2 by 4 to shake things up Think about that Dave Still your friend Art |
Equilibrium and Ham examinations
On Thu, 18 Sep 2008 14:35:38 -0700, Jeff Liebermann
wrote: Incidentally, the LearnByDestroying.com has nothing to do with ham radio. A college I attended has the motto "Learn by Doing". http://en.wikipedia.org/wiki/California_Polytechnic_State_University That morphed into "Learn By Destroying" which seemed to be the practice in the engineering department. Since graduating with a rather substantial damage fee, I have adopted it as my personal motto. If you haven't destroyed and later repaired it, you don't understand how it works. Oops. Wrong Cal Poly: http://en.wikipedia.org/wiki/California_State_Polytechnic_University,_Pomona The San Luis Obispo motto of "Discere Faciendo" which is Latin for "To Learn by Doing" was once the motto for both skools. The motto and seal for Pomona changed when the skools split in the 1960's to "Instrumentum Disciplinae" which is Latin for "Application of Knowledge". This was often incorrectly interpreted as "Instrument of Discipline" as indicated by the hammer and mace like weapons in the logos. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Equilibrium and Ham examinations
On Thu, 18 Sep 2008 14:28:18 -0700 (PDT), Art Unwin
wrote: ...where as, your expertise in mathematics can test the logic to its limits which defy opposition Ok, let's test your logic. So far, I've seen exactly one prediction of yours worth testing. It's you claim that current flows primarily in the center of a conductor. Avoiding the math for now, let's do the necessary thought experiments. If this were a court of law, the judge would prepare a set of rhetorical questions, all of which must be true if the plaintiffs claims were true. I'll do the same. 1. If current flows along the inside of a wire, and not on the outside, how does the field radiate through the alleged non-conducting outer part of the wires? The radiation would be trapped inside the conductor, only to perhaps emerge at ends. 2. If current flow along the inside of a wire, then it would seem that increasing the effective diameter of the conductor would have no effect on its impedance. Measurements of the Q of large diameter conductors versus small diameter conductors have show that impedance goes down with an increase in wire diameter. 3. How does a cage antenna work? The effective diameter is huge, but there's a giant hole in the middle, through which no current is conducted. If most of the RF current flowed through the center, and there is no center, then a cage antenna can't work. I can conjur a few more rhetorical questions, but these should be sufficient to illustrate the problem. Your antenna current distribution model does not fit very well with tested reality. Got any more prediction? I need the target practice. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Equilibrium and Ham examinations
On Sep 18, 7:02*pm, Jeff Liebermann wrote:
On Thu, 18 Sep 2008 14:28:18 -0700 (PDT), Art Unwin wrote: ...where as, your expertise in mathematics can test the logic to its limits which defy opposition I am having a go at this before I read the questions!!!! Ok, let's test your logic. *So far, I've seen exactly one prediction of yours worth testing. *It's you claim that current flows primarily in the center of a conductor. *Avoiding the math for now, let's do the necessary thought experiments. *If this were a court of law, the judge would prepare a set of rhetorical questions, all of which must be true if the plaintiffs claims were true. *I'll do the same. 1. *If current flows along the inside of a wire, and not on the outside, how does the field radiate through the alleged non-conducting outer part of the wires? *The radiation would be trapped inside the conductor, only to perhaps emerge at end Answer Not so a length of radiator which is a fractional wavelenth will have charges in motion on the outside creating radiation the rest of the charge length will be inside the radiator where a magnetic field cannot be created and particles if they were present cannot pierce the eddy current on the surface. For radiation at all times the radiator must be a wavelength or multiple thereof or a period of the frequency in use for radiation to not disappear from the surface where the levitating force is present to eject particles 2. *If current flow along the inside of a wire, then it would seem that increasing the effective diameter of the conductor would have no effect on its impedance. *Measurements of the Q of large diameter conductors versus small diameter conductors have show that impedance goes down with an increase in wire diameter. Answer Not so. the increase in diameter does not affect conditions that are exposed to air thus the progression of skin depth is the same. Thus copper losses on the inside circuit will be reduced as well as lost radiation resistance in the circuit. I previously stated that copper losses on the inside of a fractional wavelength antenna must be considered separately from the groundplain resistance which is required i.e. they are two separate resistances in series. Answer 3. *How does a cage antenna work? *The effective diameter is huge, but there's a giant hole in the middle, through which no current is conducted. *If most of the RF current flowed through the center, and there is no center, then a cage antenna can't work. I am not familiar with a cage antenna but from the above description is that it is transformed into a Farady cage Answer I can conjur a few more rhetorical questions, but these should be sufficient to illustrate the problem. *Your antenna current distribution model does not fit very well with tested reality. Hmm why not? Got any more prediction? *I need the target practice. Yes Earlier I pointed to the fact that eddy current can be neutralised such that particles canot be ejected from the surface Indeependent testing showed there was nothing to prevent particles from settling on a diamagnetic substance thereby inducing an oscillation . At the same time on the transmitting side the particles were still present on the diamagnetic surface because the ejection force was neutralised thus preventing ejection otherwise seen as transmission. Another one The computor on the first example disapointed me as I expected a higher gain (stated on this net)When I corrected the nullification of the foucault current by separation the computor program gave the gain I initiall expected in gun shot form which migrates in a way to a lazer ray which is oif a similar science thus HF does not necessarily have to diverge such that gain is nullified. If you want more target to aim at listen for the BIG BANG and then aim at the resulting BLACK HOLE -- Jeff Liebermann * * 150 Felker St #D * *http://www.LearnByDestroying.com Santa Cruz CA 95060http://802.11junk.com Skype: JeffLiebermann * * AE6KS * *831-336-2558 Art |
Equilibrium and Ham examinations
On Sep 18, 8:52*pm, Art Unwin wrote:
On Sep 18, 7:02*pm, Jeff Liebermann wrote: On Thu, 18 Sep 2008 14:28:18 -0700 (PDT), Art Unwin wrote: ...where as, your expertise in mathematics can test the logic to its limits which defy opposition I am having a go at this before I read the questions!!!! Ok, let's test your logic. *So far, I've seen exactly one prediction of yours worth testing. *It's you claim that current flows primarily in the center of a conductor. *Avoiding the math for now, let's do the necessary thought experiments. *If this were a court of law, the judge would prepare a set of rhetorical questions, all of which must be true if the plaintiffs claims were true. *I'll do the same. 1. *If current flows along the inside of a wire, and not on the outside, how does the field radiate through the alleged non-conducting outer part of the wires? *The radiation would be trapped inside the conductor, only to perhaps emerge at end Answer Not so a length of radiator which is a fractional wavelenth will have charges in motion on the outside creating radiation the rest of the charge length will be inside the radiator where a magnetic field cannot be created and particles if they were present cannot pierce the eddy current on the surface. For radiation at all times the radiator must be a wavelength or multiple thereof or a period of the frequency in use for radiation to not disappear from the surface where the levitating force is present to eject particles 2. *If current flow along the inside of a wire, then it would seem that increasing the effective diameter of the conductor would have no effect on its impedance. *Measurements of the Q of large diameter conductors versus small diameter conductors have show that impedance goes down with an increase in wire diameter. Answer Not so. the increase in diameter does not affect conditions *that are exposed to air thus the progression of skin depth is the same. Thus copper losses on the inside circuit will be reduced as well as lost radiation resistance in the circuit. I previously stated that copper losses on the inside of a fractional wavelength antenna must be considered separately from the groundplain resistance which is required i.e. they are two separate resistances in series. Answer 3. *How does a cage antenna work? *The effective diameter is huge, but there's a giant hole in the middle, through which no current is conducted. *If most of the RF current flowed through the center, and there is no center, then a cage antenna can't work. I am not familiar with a cage antenna but from the above description is *that it is transformed into a Farady cage Answer I can conjur a few more rhetorical questions, but these should be sufficient to illustrate the problem. *Your antenna current distribution model does not fit very well with tested reality. Hmm why not? Got any more prediction? *I need the target practice. Yes Earlier I pointed to the fact that eddy current can be neutralised such that particles canot be ejected from the surface Indeependent testing showed there was nothing to prevent particles from settling on a diamagnetic substance thereby inducing an oscillation . At the same time on the transmitting side the particles were still present on the diamagnetic surface because the ejection force was neutralised thus preventing ejection otherwise seen as transmission. Another one The computor on the first example disapointed me as I expected a higher gain (stated on this net)When I corrected the nullification of the foucault current by separation the computor program gave the gain I initiall expected in gun shot form which migrates in a way to a lazer ray which is oif a similar science thus HF does not necessarily have to diverge such that gain is nullified. If you want more target to aim at listen for the BIG BANG and then aim at the resulting BLACK HOLE -- Jeff Liebermann * * 150 Felker St #D * *http://www.LearnByDestroying.com Santa Cruz CA 95060http://802.11junk.com Skype: JeffLiebermann * * AE6KS * *831-336-2558 Art Here is another on per Newton for stabalization ech action has an opposite reaction. I have pointed to the construct to represent these two forces where the rotators are at right angles to each other as with the Foucault current. On a terrstial scale tidal forces must also produce eddy currents of circulating water. Such large areas have beem found lately of the coast of Spain which is now widening the search rather than relying on idle reports from shipping. Since weather is also in terrestial form a storm force by definition requires the same force for stabalisation thus the whirl pool and the tornado. Note the reaction force is sometimes swamped by the providing force by paramagnetic effects tho with respect to tornadoes droplets of water as well as the particles at rest are drawn up into the sky where water as a diamagnetic material provides a shift in energy of a static form. Jeff everything seems to mesh with what I am disclosing In addition when the droplets of water gets colder and turns to ice the resident particles are forced to find a new home and gyrate towards water which trees and humans consist of. The contained energy of such particles is so small that it is inconseivable that serch for a new resting place would contain energy of stellar size but the movement of such particles at a high speed would provide harmonic motion to the particles to generate a swarth of different frequencies. And it gos on and on Art |
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