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Dipole Antenna fed with Coax

  • 06 Nov 2017 7:47 AM
    Message # 5561593
    Rick Bean (Administrator)

    A very simple antenna to build is a dipole which can also be set up as an inverted V.

    It will be fed with coax and tuned to the band you want to use so no tuner is necessary.

    Remember that 468/Mhz=1/2 wave length. Let's say we want to make a 40 meter dipole for the voice area of the band. 468/7.2=65 feet. so each side would be 1/4 wave length (32.5 feet).

    Always cut the wire a little long and cut to tune for low swr. An antenna analyzer is really helpful for this.

    Almost any wire will do. Insulated or not is ok.



    I cut this out of a piece of plexiglass, but PVC pipe works or you can buy an insulater and the UHF connector.




  • 13 Nov 2017 7:29 AM
    Reply # 5583939 on 5561593
    Chris Doering (Administrator)

    Thank you for this close up posting Rick. This is very similar to what I saw this weekend, except your line was insulated. I'm assuming there is no difference between uninsulated and insulated in terms of transmission correct?

  • 14 Nov 2017 7:02 AM
    Reply # 5585680 on 5561593
    Rick Bean (Administrator)

    insulated or not is ok although if you are going to run it through trees insulated would be better.

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