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Yuri
I was relying on statements from Roy in the past where close spaced wires causes errors. In a inductance coil each wire is in close proximetry to other wires in the coil that undergo voltage changes Thus by his statements his limited number of segments available could cause errors. It was for this reason my modelling picture was the image of a real coil with close spaced coils und unlimited segments available which when increased did not change the supplied.results, the test for finality in modeling. One of the reasons I chose this aproach was when modeling critically coupled coils, lumped loads which are imaginary and dimensionless gave problems with critically coupled distances from the center line of a coil ie inside the coil, to distances to outside the coil in a single plane, as well as the capacitive coupling provided by the length and shape of the coil To me it was important for the program to do it's job with a real life coil without any intrusions and assumptions imposed by the operator. If a program has limitations imposed then it is a sign that human overuling intervention is required to prevent the program from running amuck. But as I stated earlier, I have no intention of getting involved in this thread with its infighting when I respect some people from both camps.and where as previously stated by a poster some responses are posed like a language but are non decipherable Art "Yuri Blanarovich" wrote in message ... Like most technical things there is nothing wrong with the use of items such as EZNEC within the limits prescribed by Roy and the coil question is outside the useable limits of the EZNEC program. Art, in EZNEC version 4.08 by using HELIX definition menu in WIRES you can define real coil, with segments. I did that at the beginning of this thread using 10m quarter wave loaded antenna showing the difference in the current at the coil ends and also what happens when you move the coil from 1/2 to 3/4 way up from the feed point. That correlates close to modeling of loading inductance by using stub and what was found by measurements in reality. If one insists in modeling loading coil as inductance with zero physical size, then you get W8JI results (same current at the ends) There is a progress, even if some still can't swallow it. 73 Yuri, K3BU.us |
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