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Amateur Radio

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  • $\begingroup$ Perhaps it is resonant. In any case, do yourself a favor and build a foolproof, wideband common-mode choke using coax in lieu of wire (that's what I always do) based on this. $\endgroup$ Commented Aug 23, 2019 at 19:35
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    $\begingroup$ @Mike Thanks, I've been through that document a few times before and it is great, but with so much related information I have a hard time finding one particular part that answers my question(s). From my results above, I'm inclined to just skip using a balun but I'm trying to understand what it's doing to my feed line. $\endgroup$ Commented Aug 23, 2019 at 20:42
  • $\begingroup$ If nothing else, you changed the length of the feedline by adding the balun you made, which may have moved a high-current point of the standing wave onto your clip-on meter. $\endgroup$ Commented Aug 23, 2019 at 21:15
  • $\begingroup$ Peter, I had the same problem. But after printing it out and carefully studying what this genius was saying, a light bulb came on. Perhaps we all can help you sort out what is applicable to you. Actually, my balun was made from his previous edition. $\endgroup$ Commented Aug 23, 2019 at 23:35
  • $\begingroup$ Even easier... go here: audiosystemsgroup.com/2018Cookbook.pdf and find page 7. 12 turns around a 2.4" OD #31 toroid core. $\endgroup$ Commented Aug 24, 2019 at 1:51