Category Archives: Antennas, Baluns and EMC

VHF-UHF Baluns

This is the talk that I presented at the RSGB Convention in October 2018.

RSGB will eventually release a video of the talk, but in the interest of publishing the technical content as soon as possible, you’re very welcome to download and click through the slideshow.

Even without the voiceover, the important points are clear:

  • Today, “baluns” are about controlling interference, reducing noise
  • Choke baluns are best for doing this.

So we should aim to:

  • Minimize common-mode RF currents on the outside of the coax
    and along the boom.
  • Don’t upset the good feedpoint balance that VHF-UHF Yagis already have.

Comments and discussion, please!  This is new information for VHF-UHF, and certainly not the last words to be said about it. It’s still very much ‘work in progress’.
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Technical slide content © 2018 Ian White, GM3SEK
Side template © 2018 RSGB
Images as attributed (except where that would be embarrassing).