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FM radio antenna

Discussion in 'Hobby Electronics' started by Fat Crack Ho, Apr 5, 2004.

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  1. Fat Crack Ho

    Fat Crack Ho Guest

    Just got a home theatre reciever. What's the best way to position the FM radio
    antenna. At the moment it's just a piece of wire. Will wrapping it in a
    specific pattern (helical, coil, etc) improve the reception or is it best just
    to tape it to the wall?

    thanks.
     
  2. Phil Allison

    Phil Allison Guest

    "Fat Crack Ho" <

    ** Mounted on the roof and aligned for the local transmitters - just
    like a TV antenna.


    At the moment it's just a piece of wire. Will wrapping it in a

    ** See above - a wire taped to the wall is a **very poor** method.

    See if you can do a split off the main TV antenna.




    ........ Phil
     
  3. Most FM receivers have two connections.
    If you have some figure 8 cable. (Twin wires that are sort of run side by
    side), grab a wire in each hand and pull it apart to an arms width, (about 2
    metres). Support it somehow so that it forms a T shape, this is what is
    known as a dipole antenna. The width of the T is about right for the FM
    band. The length is related to the frequency.
    Connect the other ends to the two terminals of the receiver. This also works
    well for TV stations still on VHF, which is the same band as FM radio.

    Email me if I've confused you.

    Marty
     
  4. Franc Zabkar

    Franc Zabkar Guest

    If you have a VHF TV antenna, then try a dual TV/FM wallplate such as
    cat # TVS67 from WES Components. "One socket goes direct to TV and the
    other is filtered for the FM band to reduce interference." Of course
    you will have no control over the antenna direction, but the reception
    may be better than any internal aerial. Price is ~$3.


    - Franc Zabkar
     
  5. C3

    C3 Guest

    I hear people mentioning directional antennae, but is there an effective
    omni-directional antenna design that works well in practice for FM?

    cheers,

    C3
     
  6. "C3" < wrote


    I hear people mentioning directional antennae, but is there an effective
    omni-directional antenna design that works well in practice for FM?

    *** Assuming that most modern FM transmitting antenna systems are
    circularly polarised,a good antenna for omnidirectional would be the old
    "coaxial antenna" cut for the middle of the FM band.

    Brian Goldsmith.
     
  7. Phil Allison

    Phil Allison Guest

    "C3"

    ** A vertical 1/4 wave antenna of about 80 cm mounted high up will work
    but having no directionality would be prone to multipath distortion - ie
    reflections from buildings, hills etc.





    .......... Phil
     
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