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![]() "Dr. Barry L. Ornitz" wrote ... Szczepan Bialek, I think I speak for the collective readership when I say we are tired of your erroneous arguments about frequency doubling and its causes. You evidently have read a little about the Luxembourg effect, but you failed to read the hundreds of articles available on the Internet on this subject. I suspect your problem is one of language and adolescent stubbornness combined. I am retired and very lazy. To make things simple for you, do your search on "Ionospheric Cross Modulation". This is defined by the IEC (Commission Electrotechnique Internationale) in their IEC 60050 International Electrotechnical Vocabulary as: Ionospheric Cross Modulation, Luxembourg effect — the modulation of a radio wave by the modulating signal of another wave having a different frequency, resulting from NON-LINEAR PHENOMENA in a region of the ionosphere through which both waves pass. Or if French is easier for you to read: Transmodulation Ionosphérique, effet Luxembourg — modulation d'une onde radioélectrique par le signal modulant d'une autre onde de fréquence différente, qui résulte D'EFFETS NON-LINÉAIRES dans une région de l'ionosphère traversée par les deux ondes. Note the emphasized words. Non-linearity of the D-layer of the ionosphere is quite well understood today. In fact, most of the initial mechanism was known before the Second World War. In the late 1940's and in the 1950's, theories were improved as different modes of propagation were studied. Today we find that this ionospheric cross modulation effect has become a tool to study the lower ionosphere. For some good reading on this subject, I suggest reading "An Introduction to the Ionosphere and Magnetosphere" by John Ashworth Ratcliffe. Much of this book can be read using Google Book Search. Another work found on the Web is the PhD dissertation of Mehmet Kürsad Demirkol from Stanford University (http://www-star.stanford.edu/~vlf/pu...kolThesis.pdf). Quoting from his abstract: Electron density and temperature changes in the D-region are sensitively manifested as changes in the amplitude and phase of subionospheric Very Low Frequency (VLF) signals propagating beneath the perturbed region. Both localized and large scale disturbances (either in electron density or temperature) in the D-region cause significant scattering of VLF waves propagating in the earth-ionosphere waveguide, leading to measurable changes in the amplitude and phase of the VLF waves. Large scale auroral disturbances, associated with intensification of the auroral electrojet, as well as ionospheric disturbances produced during relativistic electron enhancements, cause characteristic changes over relatively long time scales that allow the assessment of the 'ambient' ionosphere. Localized ionospheric disturbances are also produced by powerful HF transmitting facilities such as the High Power Auroral Stimulation (HIPAS) facility, the High frequency Active Auroral Research Program (HAARP*), and also by lightning discharges. Amplitude and phase changes of VLF waveguide signals scattered from such artificially heated ionospheric patches are known to be detectable. Nowhere in all of the respected literature will you find frequency doubling caused by the two ends of a dipole. So I do not have to read the above. In fact, the end "balls" of Hertz's experiments were nothing more than capacitance hats. The experiment would have worked perfectly well without them. It is impossible to make the dipole without ends. You have pushed the patience to the breaking point of many of this newsgroup's readers, including some experts far more knowledgeable in electromagnetics than myself. Expletives from these people, while certainly deserved, are not needed. Until Szczepan does his research on ionospheric cross modulation, I suggest that we just ignore him (or use a killfile). I encourage ALL you to make proper experiments with the "frequency doubling caused by the two ends of a dipole." See discussion with Wim: "Hello Szczepan, You are right, charge is compressible. The charge that is required to charge (for example) a sphere seems Seems or unquestionable? to break the coninuity equition as is used for incompressible fluid in hydraulics. Continuity in electromagnetism is regained by introducing the D-field (dielectric displacement). The D-field is responsible for the capacitive current in case of varying E-field. So in your products is the dielectric displacement or compressed electrons? Regarding frequency doubling. We can be lucky. Antennas and propagation behaves in virtually all cases linearly. From linear systems you might know that input and output frequency are the same, so no doubling in frequency. Try understand me. Your Hertz dipole emits electrc waves from the TWO ends (opposite phases). So the electrons in a receiving antenna are kicked twice more frequent. In case of non-linear parts in a system (for example a corroded connector in an antenna cable that is used by two or more transmitters, that may behave as a semiconductor), you might get so called mixer products (sum frequencies, harmonics, difference frequencies, etc). Harmonics may be the reason that nobody have seen the Phenomenon. If you would like to know more about EM-fields related to antennas and electronics, just start with classical EM theory. This is a solid tool, existing over 100 years and is used by many people with succes to predict behaviour of circuits and antennas. If this will change of today, I will close my business activities next monday. EM existing over 100 years and will be used the next as the "piece to teach". Your business base on experiments. Now You have the opportunity to make the most famous experiment in the history. If the result will be null I will change my hobby." S* -- 73, Dr. Barry L. Ornitz WA4VZQ * This group is also not the place to bring up conspiracy theories involving this research program. |
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