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antenna size ?

Discussion in 'CB Antennas' started by Arkieguide, Jul 26, 2018.

  1. Arkieguide

    Arkieguide New Member

    May 27, 2018
    Likes Received:
    I am trying to build a CB 3 element beam - Ever formula I find on line gives me different answers.I use the wave length of 33.4444 - most come up with close to the same element length but boom sizes are different. I decided on a 10' boom, reflect - 220" - DE -198" D - 180" & R to de = 67" and de to d - 51". My boom is 12' so I can adjust some.What are your thoughts please. Thanks - arkieguide


  2. sp5it

    sp5it Master of puppets

    Jul 9, 2009
    Likes Received:
    Shadetree Mechanic likes this.
  3. Captain Kilowatt

    Captain Kilowatt Professional Amateur
    Staff Member

    Apr 6, 2005
    Likes Received:
    Different designs will result in different lengths and spacings. That's the easy and short answer to your question. No one design is the best of the best as there are just too many variables to deal with such as gain, FB ratio, bandwidth, then you get into available tubing sizes, one piece or tapered tubing, element spacings to achieve best gain, or impedance matching etc etc etc. You can either beat your head against the wall trying to design your own from scratch without benefit of an antenna test range or you can simple copy a proven design where all the extreme math has already been done for you.

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