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4:1 Balun

Discussion in 'Antennas, Feedlines, Towers & Rotors' started by WZ0M, Sep 27, 2018.

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  1. WZ0M

    WZ0M Ham Member QRZ Page

    I have two t200 2 powered iron toroid cores. Can I make a 4:1 current balun with them?
    To be used on a OCF Dipole.
     
  2. KC8VWM

    KC8VWM Ham Member QRZ Page

    What's the frequency range of the OCF?

    T200-2 is really only effective up to around 10 MHz.

    t200-2.jpg
     
    W1TRY likes this.
  3. WZ0M

    WZ0M Ham Member QRZ Page

    Thanks for the info. I will be operating at 30 Mhz or more. Looks like I will order the
    Ferrite cores before making the balun.
     
  4. KU3X

    KU3X Ham Member QRZ Page

    Must use ferrite. Powered iron has very little choking reactance.
    Either use two each FT 240-43 cores or two each FT 240-31 cores.

    Mouser is a good place to purchase ferrite or use this guy.
    http://kitsandparts.com/toroids.php

    You can use a 4 x 4 x 2 nema enclosure to put the cores in. Home Depot or Lowe's carries them.
    Luck on your project.
    Barry, KU3X
     
    KC8VWM likes this.

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