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HOW TO WIND A TOROID BALUN

HOW TO WIND A TOROID BALUN. ( Bal - anced to Un -balanced). K8KIZ 7/2014. Voltage or Current?. Voltage baluns are easier to make and will work in any number of situations.

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HOW TO WIND A TOROID BALUN

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  1. HOW TO WIND A TOROID BALUN (Bal-anced to Un-balanced) K8KIZ 7/2014

  2. Voltage or Current? • Voltage baluns are easier to make and will work in any number of situations. • Current baluns, while more difficult, tend to be more effective over a greater range of circumstances, balancing the current on both sides of the antenna. • Usually, any balun is better than no balun. K8KIZ 7/2014

  3. One Remedy for RF on Coax… With neater turns, this free form ‘UGLY’ balun is as good as the one above! Photo Credit: K3DAV K8KIZ 7/2014

  4. Buy or Make? • Both voltage and current baluns are available from a number of manufacturers. • Making your own is definitely within the capability of the average ham. • Using a readily available kit, you can save at least 60% off the price of a commercial unit. K8KIZ 7/2014

  5. Here’s a Wireman kit… $15.35 K8KIZ 7/2014

  6. Here’s What You Get: Not included! K8KIZ 7/2014

  7. Wrap the toroid with the glass tape:(This protects the enameled wire from scratches.) K8KIZ 7/2014

  8. Toroid is ready for winding: K8KIZ 7/2014

  9. Make a pattern for the required turns of wire…. 10 turns = 36 degree divisions K8KIZ 7/2014

  10. Mark the ‘turns’ on the toroid. K8KIZ 7/2014

  11. Anchor a wire pair:(Be sure to identify each end of each wire!) K8KIZ 7/2014

  12. Toroid is now wound with 10 turns. A wire that passes through the center of the toroid counts as one turn! K8KIZ 7/2014

  13. Wire pairs are easily identified. K8KIZ 7/2014

  14. Coil ends are joined for 4:1 ratio. K8KIZ 7/2014

  15. Coil & SO-239 mounted in box. K8KIZ 7/2014

  16. Balun is attached to OCF antenna.(Crimp & Solder – no external mechanical connection.) K8KIZ 7/2014

  17. Another view for detail. K8KIZ 7/2014

  18. Ferrite Bead Specifications: K8KIZ 7/2014

  19. Beads come in many sizes. K8KIZ 7/2014

  20. Adding ferrite beads to coax at antenna feed point. Heat Shrink Tubing. K8KIZ 7/2014

  21. Another view….(10 bead total recommended) Start the shrink wrap at the bottom, so the top piece will overlap for water drainage. K8KIZ 7/2014

  22. Flying high & working great! K8KIZ 7/2014

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