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    FM transmitter mzunguko mchoro

     

    sehemu muhimu zaidi ya hii transmitter 88-108 ni Colpitts oscillator. C3, C4, C5, C6, CD1-CD2 ans L1 kuamua frequency maambukizi. The RF Oscillator mzunguko ina BF982 MosFet transistor wich ni sehemu ya kazi. wengine 2 transistors kutenganisha VCO kutoka antenna.

    hatua ya kwanza BF199 hukunjua signal dhaifu kutoka VCO na kazi katika mzigo mara kwa mara. hatua ya pili BFR90 hukunjua ishara rf kupakia antenna wich mapenzi kung'ara radio frequency nguvu.
    Antenna inaweza kuwa moja ya waya, 70 cm mrefu. L1 coil ina 1mm nene waya shaba, zamu 3.5, 5 kipenyo cha mm na nafasi 1mm kati ya zamu.
    Unaweza kutumia BF199 badala ya BFR90 na MV104 badala ya diodes 2 varicape.

    FM transmitter mzunguko mchoro

     

     

     

     

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