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Hi Richard:
[snip] Insecure, aren't "we?" [snip] Who me? Never! [snip] Rolling up the rug before it is snapped? [snip] I learned that from The Master... where is Reg when you need him? [snip] A nice elimination of a demarcation, but it says nothing of which side of the line you are standing. Are you on the steady state side (which, of course has never existed), or the transient state side (that is, the only one that has ever existed)? Be careful of your choice, as history (woops, there goes a transient) will mock you! ;-) [snip] OK, here's the deal... Admittedly a thought experiment, if Cecil can do it then others are entitled, no? Let's say that I was sitting in The Restaurant at the End of the Universie and in the basement there, I hooked a solenoid and a resistor in series with a battery at exactly 1.0 sec after "The Big Bang". Now the DC current has been flowing through that solenoid ever since. Then in the year of our lord 2007 I want to measure the radiation due to the centripital acceleration of the charges flowing round and round the turns in that solenoid. Q1a: Is there any dectectable radiation? If not, why then do we all seem to agree that charge acceleration causes radiation? Q2a: If so, what exactly is the frequency of that radiation? Is this an example of a zero frequency [Or say a very nearly zero, e.g. ~1.0exp(-89) Hz] radio wave? [snip] Frequency, or spectrum, through the Supreme Force of the Universe's gift to us of "The Sinudoids" is intimately related to circular motion. Most intimate relations consist of back-and-forth. [snip] I agree that both circular and reciprocal motion are among the wonderful experiences of intimate relations, but... Reciprocal motion is not circular motion! [snip] Acceleration we know is the rate of change of velocity. Faster - faster - FASTER! [snip] Hmmm... You have a point Richard... The human gestation period is ~ 280 days, if so long then I wonder why speeding up towards the end of the act of insemination? [snip] In the steady state at DC electric charges are moving at a constant velocity. You are confusing charge with carrier. [snip] I may be, but that is irelevant to the question, for as you well know... the mere motion of charge, no matter how carried, is all that is germain in the celebrated Maxwell/Heaviside equations of classical electrodynamics. [snip] Thus when moving in a straight line at constant velocity there should be no "waves" launched or radiated, no? Well, are you afore it? or against it? [snip] I thought it was obvious, I'll explicitly go on record here... With Maxwell and Heaviside, I believe that electromagnetic waves are radiated into space by the acceleration of charge! Period, end of story! [snip] My point here is the assertion of the real existence of DC waves either guided or free! Edison would have beat Tesla to transferring power over the air if that were so. Problem is wavelength, you need infinitely long halfwave antennas - umm, WOW inspiration! That is exactly what Edison had. He DID beat Tesla with transferring DC power over the air when he supplied all his customers with antennas. AND they used guided wave principles. [snip] Phfffttt.. Extremely long dipoles are no problem for those of us who live in the Restaurant at the End of the Universe. My dipole extends from there back to epicenter of The Big Bang! [snip] Q0: Is there electromagnetic radiation (are photons emitted) from a solenoidal (helix) carrying DC because of the centripital acceleration of the charges? Of course. [snip] Give that man a cigar! I'm glad you agree Richard. [snip] Q1: Do electromagnetic "waves" exist at DC, whether guided or free? That has been historically shown. Q2: Can incident DC "waves", whether guided or free ever be "reflected"? Certainly. Q3: Can a VSWR be measured (at zero frequency) on a transmission line/waveguide that supports DC? [snip] Wow... you have figuratively wiped out the almost the whole left side of the board on "Deal or No Deal". I'm impressed! [snip] Break the line and hold each half with your hands. [snip] Crude but it works if you are only interested in one significant finger of accuracy! [snip] Q4: Is the VSWR at DC related, in any way at all to the VSWR at higher frequencies? You just said it, frequency. Transient! For shame. Pete, just plain crazy, none of this is reality! You don't believe your eyes? There's a career for you heading the CIA (or Justice Department, or Homeland Scrutiny, or... choose one) under the current administration. [snip] That is a three letter agency, do such agencies serve Politics or Physics? Maybe a four letter agency career would be more appropriate, no? [snip] most RRAA'ers seem Sorry about that insecurity thingy. [snip] I suffer from many afflictions, and they grow more numerous as I gracefully age, but... with the invention of that wonderful blue pill by Pfizer, I now find that insecurity is no longer among those afflictions! [grin] [snip] Q4: If the Bird can't do it Should this be Q5 or at least Q4.1.v.1? [snip] Oops... Now I've gone and done it... Thanks for pointing that out, I now see that I've abused the traditional protocols observed by Internauts, USENET convention suggests only one rhetorical question per posting! Mea culpa! [snip] Anyway, simply because you cannot afford that range slug doesn't mean the Bird cannot do it. [snip] Bird now sells range slugs that cover the band [1.0E-98Hz - 1.0E-99 Hz]? [snip] Q5: If waves do not exist at DC, then at what magic frequency, lets call this frequency f(mgc), do waves cease to exist? Insecurity now is corrupting your confidence in the topic and polluting it with transients. As you dismissed them above, we (using the insecure form of I) might think you are suffering from optileptic seizures. [snip] I believe that f(mgc) is exactly zero! Reflections will be encountered and can be measured at DC! The question is said Humpty Dumpty, "What is the physical interpertation of "conjugate match" and "image match" [That's Zo-match for you Zo affecianados!] at DC. [snip] Q6: Below what magic frequency, lets call it f(mgc), do radiation and or reflection phenomena stop? A Chebyshev filter might do it. [snip] Now you are being silly, the frequency of ripples in the passband of a Tchebychev filter [measured in cycles per Hz!] is non-linear and irrelevant to the present discussion. [snip] Q7: What is the difference between a "conjugate match" and a "Zo-match" at DC? No conjugal relations? No back-and-forth. You can't tell the difference? [snip] Oh... Now your leg is within the reach of the jaws of the trap, if Reg were with us he would trigger it at the next posting! But then Reg was really just a teddybear! [snip] Food for thought, eh? Slim Fast with half the calories. [snip] Slim Fast is an expensive way to not get the good stuff! Calories = Zero, Carbohydrates = Zero, Fats = Zero Photons... priceless! [snip] I miss dear old Reg! Thoughts comments... I can't think of a thing to say. [snip] But not for long! This is The Cottonmouth, Ya'll come back... [grin] [snip] 73's Richard Clark, KB7QHC [snip] Thanks for the repartee Richard, you are a gem! -- Pete k1po Indialantic By-the-Sea, FL Andrea is outta sight, no hurricanes yet on this beach... |
#2
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On Sun, 13 May 2007 23:58:59 GMT, "Peter O. Brackett"
wrote: Q1a: Is there any dectectable radiation? With your misspell, I almost read that as delectable. Would certifiably ordinary normal RF spectrum be detectable? It doesn't even have to meet any spectrum limitations (being at either end of the extremes) to make that equivocal, why would DC radiation be any different? However, there are considerations that are specific to the wavelength that in a normal or even extra-normal situation would still offer a simple NO. It would not be detectable for all the same reasons as the pedestrian examples: Q, Energy, and S+N/N. DC suffers tremendously for every criteria. Energy would be well below the FemtoKelvin range. S+N/N would be swamped from any of a number of noise sources. Enough Q would be impossible to obtain to distinguish DC from GigaMeter wavelength AC sources. If not, why then do we all seem to agree that charge acceleration causes radiation? It's an hackneyed cliché meant to sooth Mensa candidates and their sponsors. Q2a: If so, what exactly is the frequency of that radiation? 0 Is this an example of a zero frequency [Or say a very nearly zero, e.g. ~1.0exp(-89) Hz] radio wave? You are being insecure again. [snip] In the steady state at DC electric charges are moving at a constant velocity. You are confusing charge with carrier. [snip] I may be, but that is irelevant to the question, for as you well know... the mere motion of charge, no matter how carried, is all that is germain in the celebrated Maxwell/Heaviside equations of classical electrodynamics. Quite the contrary. A carrier always moves charge, but a charge does not always move a carrier. This is the difference between inductance and capacitance (which most folks, materialists, think resides specifically in the coil or the plate). DC does NOT always involve moving charge or carriers. You defined it yourself, is your insecurity doubting the initial condition? One of the most frequent errors in this group is shifting frames of reference and then trying to convince everyone it isn't a shell game they are trying to pull. [snip] Thus when moving in a straight line at constant velocity there should be no "waves" launched or radiated, no? Well, are you afore it? or against it? [snip] I thought it was obvious, I'll explicitly go on record here... With Maxwell and Heaviside, I believe that electromagnetic waves are radiated into space by the acceleration of charge! Well, there's a brave and bold step forward. Period, end of story! Dubious emphasis. Weren't you already convincing with the first exclamation? [snip] My point here is the assertion of the real existence of DC waves either guided or free! Edison would have beat Tesla to transferring power over the air if that were so. Problem is wavelength, you need infinitely long halfwave antennas - umm, WOW inspiration! That is exactly what Edison had. He DID beat Tesla with transferring DC power over the air when he supplied all his customers with antennas. AND they used guided wave principles. [snip] Phfffttt.. Extremely long dipoles are no problem for those of us who live in the Restaurant at the End of the Universe. My dipole extends from there back to epicenter of The Big Bang! Edison was lucky that his subscriber's dipoles all interfered (physically) with overlapping elements (early linear loading). Tesla's RF work at transmitting power in Colorado Springs proved he was oxygen deprived at that elevation. Bird now sells range slugs that cover the band [1.0E-98Hz - 1.0E-99 Hz]? I didn't say they offered it, I said that you couldn't afford it. The question is said Humpty Dumpty, "What is the physical interpertation of "conjugate match" and "image match" [That's Zo-match for you Zo affecianados!] at DC. How do you obtain an infinite reactance to fulfill conjugation? [snip] Q6: Below what magic frequency, lets call it f(mgc), do radiation and or reflection phenomena stop? A Chebyshev filter might do it. [snip] Now you are being silly, the frequency of ripples in the passband of a Tchebychev filter [measured in cycles per Hz!] is non-linear and irrelevant to the present discussion. The ripples are only in pass-band. Skirt will eventually take care of DC (after-all there is only one frequency to stop). 73's Richard Clark, KB7QHC |
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