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Long Range FM Transmitter Circuit

Konusu 'Fm Verici Devreleri' forumundadır ve guclusat tarafından 23 Şubat 2013 başlatılmıştır.

  1. guclusat

    guclusat Tanınmış Üye Süper Moderatör

    14 Haziran 2009
    Ödül Puanları:
    In the FM transmitter circuit diagram, you can important]find the values of the components used. A suggestion for construction is that you can build the circuit blocks per step starting from the oscillator, buffer, and then final. On the oscillator, the configuration of L1 has 6 turns and tapped at 2.5 turns. You can experiment by turning the output frequency of the capacitor trimmer R5, or even for higher frequencies up to 150 MHz.

    Long Range FM Transmitter Circuit Diagram

    Once you have established a working frequency of the oscillator in the range 88-108 MHz, you can further build up the buffer that is at or 2n3866 2N4427 transistor. You can set the buffered output power is up to several hundred mW through a C9/C10 (R6 as a dummy load), where the output power level is used to drive the final amplifier. Of course in the output power of this tune you have to use a VHF power / SWR meter.
    The next step is to complete the entire circuit in the final. Tuning is done using the C11/C12. Use of a dummy antenna load on the power / SWR meter to determine your maximum output power up to 5W. Then you can adjust the output impedance of the antenna.
    To assemble the entire circuit can use the PCB upside down, so that a better grounding. You can create barriers to meeting the component lead and manage in such a way. Keep the component leads cut short as necessary. Alternatively, you can make a PCB, and then assemble the components.

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