Derivation of the 468 over f formula for the length of a dipole

Posted on January 30, 2021 by dcasler

Per request from KEØKRO, here is the chart showing the derivation of the formula that the length in feet of a dipole is 468 divided by the frequency in Megahertz.

Also, you can go here for a higher resolution PDF for printing the entire presentation.

This appears in the video “Frequency, Wavelength, and the Speed of Light (Ask Dave 358)”.

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3 Responses to Derivation of the 468 over f formula for the length of a dipole

  1. Tim says:
    February 1, 2021 at 12:52 pm

    Silver, W. (2010). Where does 468 Come From? Retrieved March 20, 2020 from https://www.eham.net/article/23802

  2. dcasler says:
    January 31, 2021 at 9:05 pm

    Check out the ARRL Antenna Book for formulas regarding making Yagis.

  3. LEONARD says:
    January 30, 2021 at 11:53 pm

    Only been licensed since 72, traveled for 37 Years so no much radio action.
    Retired at 73, now 77 and attempting to build a 3 el. 10 mtr. short boom
    mono bander for the upcoming 10 mtr. contest. Wish
    I had a reliable sourse for this antenna that works well.
    Just trying to get more active on the radio now that I
    have more time for the worlds best hobby.
    Thanks for being there with lotz of great info.
    73
    Leonard WD5CAY

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