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  • venkatkumar

    Member • Sep 30, 2008

    What is the range of license-free band frequencies
    upto 1 kilometers?It's very urgent.....
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  • docel

    Member • Sep 30, 2008

    There is NO licence-free band for a received range of 1km.

    This is difficult to digest, as all power output constraints talk in terms of ERP which is a function of bandwidth and Frequency.
    Besides, the main rule for Licence-free band operations is Low power Short Range devices without external antennae.
    All specifications are in "funny" techno-legal language, less understood by lesser mortals. But the end result is the same: There is NO Licence-free band for a range of 1KM.
    Meaning, the rules does not allow Free communication beyond 100m.
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  • sauravgoswami

    Member • Sep 30, 2008

    Buddy,why dont ya try using HAM radio frequency!!!!they are available for free
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  • venkatkumar

    Member • Oct 3, 2008

    sauravgoswami
    Buddy,why dont ya try using HAM radio frequency!!!!they are available for free

    what is HAM radio frequency?
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  • sauravgoswami

    Member • Oct 3, 2008

    well tat depends on the operator,i will definately let u know the frequency in my area!!!!
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  • docel

    Member • Oct 3, 2008

    Sorry, friend.....HAM (Amateur Radio) frequencies are NOT free.
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  • Kaustubh Katdare

    Administrator • Oct 3, 2008

    No flames, please!

    We all are here to share knowledge; everyone's intention is to help each other.

    #peace#
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  • sauravgoswami

    Member • Oct 7, 2008

    hey docel,why dont ya take permission form the authorities,they provide access to frequencies for experimental purposes and wat more, u can get watever bandwidth u require,u just have to convince them!!!
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  • docel

    Member • Oct 7, 2008

    Huh????
    Have you tried for that permission anytime??
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  • venkatkumar

    Member • Oct 8, 2008

    Frequency mixer

    I want a frequency mixer circuit using op-amp(frequency modulation)...how to add the two frequencies in the transmission...
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  • venkatkumar

    Member • Oct 8, 2008

    What is HAM frequency and the range of HAM frequency?
    Which band is free for transmission upto 100m?
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