Homemade FM Antenna

Discussion in 'Wireless & RF Design' started by dthx, May 12, 2016.

  1. dthx

    Thread Starter Member

    May 2, 2013
    194
    14
    I like to sit on my back deck in the evening with a drink and listen to a favorite radio program.
    The reception was poor and seemed to come and go..
    I had put a piece of wire about 6 ft. long attached to the FM antenna lug on the back of my stereo...and I have to move it around to get reception from time to time...it's never solid.
    So I copied a youtube video on the subject.
    I took a piece of 2" dia. pvc about 3 ft. long and wrapped it spirally with a single speaker wire ...leaving about a 1/2 " gap between the wraps.
    I anchored the wraps down with a small dab of hot glue every now and then to keep the wraps on the pvc.
    I hooked it up to my radio and the signal seems to be stronger and the reception locks in better.
    Am I on the right track?
    Will the glue act as an insulator somehow ( I put a dab about every 2 inches or so all around the spirals to hold the wire down)....and affect the antenna?
    Thanks for the advice/expertise.
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,969
    744
    Glue wont conduct, so you can lash it all over, most fm dipoles are around 1.5mtrs long.
     
  3. bertus

    Administrator

    Apr 5, 2008
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    #12 likes this.
  4. dthx

    Thread Starter Member

    May 2, 2013
    194
    14
    Yep...I'll take a picture of it and post it when the sun comes up...
    thanks
     
  5. dthx

    Thread Starter Member

    May 2, 2013
    194
    14
    See drawing attached
    Thanks for the link to How to build a fm antenna...it really helps...mine is nothing like it's supposed to be.....guess I'll go get some antenna wire and follow the instuctions....
    thanks​
     
  6. bertus

    Administrator

    Apr 5, 2008
    15,645
    2,344
    Hello,

    One note on the folded dipole. It has an impedance of 300 Ohms.

    Bertus
     
  7. dthx

    Thread Starter Member

    May 2, 2013
    194
    14
    Thanks...looks like the indoor fm is the way to go for me......
    see ya!..and thanks.
     
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