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goulart

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Posts posted by goulart

  1. Hi!

    I'm preparing myself to go QRPp and now I'm doing my best to design and construct a balun to delete the so called I3 current that flows on the outside of the coaxial ground mesh. I've tried many, many internet sites, and I do have learned a lot about coils, inductance and baluns but no one has already given me a hint about the calculation, or, answered my question:

    HOW MANY TURNS OF WIRE I have to wind in an air core 40mm in diam. to delete the spurious current and still NOT AFFECT THE WANTED RADIO SIGNAL?

    What I have in mind is 1 coil "A" at the end of the coaxial, 1 coil "B" at the end of the coaxial mesh, and, 1 coil "C" linking after the "A" with before the "B" coil.

  2. Thanks a lot, DR OM
    Bjorn/SM2GXN

    I'm going there right now, to download it...!  :)
    73 FM
    PY2TKS/pp2, Ed Goulart


    Hi goulart and welcome to this forum!

    The only software I know of that is free LTSpice/SwitcherCAD III made by Linear Technology, you can download it for free at theirs website.
    Download it from this link: http://www.linear.com/company/software.jsp
    This software is for design of their own switchers but if you download it you will see that it is capable of doing a lot more as a matter of fact it's widely used by lots of people in different areas of electronic.
    I've used it myself for about a year and I like
  3. Hi, everybody!

    I'm a newly retired guy who is devouting himself to study electronics, specially subjects related to radioamator. Can anyone advise me on...
    What is the best choice on a FREE software that makes a circuit, tests and runs it?
    I've tried a lot of them (that says to be free, but are not - or are seriously cripled...)

    Thanking beforehand,
    PY2TKS/pp2, Ed Goulart

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