want fm transmitter circuits

Discussion in 'Wireless & RF Design' started by asghar qaisrani, Jan 29, 2011.

  1. asghar qaisrani

    Thread Starter New Member

    Jan 11, 2011
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    i want 2-3 km range fm transmiter with simplest equipments
     
  2. nerdegutta

    Moderator

    Dec 15, 2009
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    What are you transmitting?
     
  3. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    What will be the purpose of the transmitter?
    You can not have any power without violating the rules.
    Please check the radio administration in your country.

    Here is a hit with a search engine:
    http://www.discovercircuits.com/F/fm-tranms.htm

    Bertus
     
  4. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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  5. radiohead

    Senior Member

    May 28, 2009
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  6. Audioguru

    AAC Fanatic!

    Dec 20, 2007
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    Don't you think the sensitivity of the FM radio make a huge difference to the range?

    The FM transmitter I designed has a range of more than 2km to my very sensitive hi-fi tuner and very sensitive car radio across a huge river valley with nothing in between.
    Its range is about 200m to my cheap Sony Walkman FM radio.
    Its range is across the street to a $1.00 radio from The Dollar Store.

    It is mono, not stereo but it has pre-emphasis so it sounds perfect.

    I don't have a licence for a radio transmitter and most FM radio station frequencies are used in my area so I used my transmitter only for about 1 hour testing its range. Maybe I am lucky that I didn't get caught causing interference to a weak distant real radio station.
     
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