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How exactly does an Fm transmitter work?

magnus2112

Hi!

How exactly does an FM transmitter work? image

What does every single component do in the process? image

Please explane in detale..

Thanks for eny answer! image


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    Sure, spectral purity isn't going to be an issue in transmitting information in FM, because the detector saturates.  It is unintended transmission that concerns me here.  If we keep our output power down, we are good.  I live in one of the most crowded areas of the US, every broadcast slot is taken.  NEIU WZRD* is only allowed 1KW, bleeds into Kennedy/King down by the loop, won't get past Cucumberland on the tollway, I digress.  I've found a little post-filtration very helpful with these, just sayin'

     

    FM was introduced during WWII and was quite welcome for its quality.  It did not displace AM entirely for servicemen in the field.  Our soldiers found that when it (FM) reached the geographical edge if faded precipitantly, 'cause the AGC gave out.  AM got progressively noisier when it reached the edge, due to the linear nature of the  RF front-end.  This typically gave our boys much more time to agree to increase power or alter their relay scheme.

     

    And yeah, we are in agreement, because it is a demo app to which you refer!

    Not saying that these radios aren't great fun, just QRP and for the country.

     

    -----------

     

    *Best station ever! -- now on WWW.  How come NW WNUR gets 10KW?

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  • 0

    Sure, spectral purity isn't going to be an issue in transmitting information in FM, because the detector saturates.  It is unintended transmission that concerns me here.  If we keep our output power down, we are good.  I live in one of the most crowded areas of the US, every broadcast slot is taken.  NEIU WZRD* is only allowed 1KW, bleeds into Kennedy/King down by the loop, won't get past Cucumberland on the tollway, I digress.  I've found a little post-filtration very helpful with these, just sayin'

     

    FM was introduced during WWII and was quite welcome for its quality.  It did not displace AM entirely for servicemen in the field.  Our soldiers found that when it (FM) reached the geographical edge if faded precipitantly, 'cause the AGC gave out.  AM got progressively noisier when it reached the edge, due to the linear nature of the  RF front-end.  This typically gave our boys much more time to agree to increase power or alter their relay scheme.

     

    And yeah, we are in agreement, because it is a demo app to which you refer!

    Not saying that these radios aren't great fun, just QRP and for the country.

     

    -----------

     

    *Best station ever! -- now on WWW.  How come NW WNUR gets 10KW?

Children