2 Watt FM Transmitter


Posted on Feb 5, 2014

The circuit is basically a radio frequency (RF) oscillator that operates around 100 MHz. Audio picked up and amplified by the electret microphone is fed into the audio amplifier stage built around the first transistor. Output from the collector is fed into the base of the second transistor where it modulates the resonant frequency of the tank circ


2 Watt FM Transmitter
Click here to download the full size of the above Circuit.

uit (L1 coil and the trimcap) by varying the junction capacitance of the transistor. Junction capacitance is a function of the potential difference applied to the base of the transistor T2. The tank circuit is connected in a Hartley oscillator circuit. P1 act as condenser microphone volume level. For FM, coil will be small. Use thin gauge enamel magnet wire. the diameter of coil will be a couple mm: use ink tube from pen to form, and try 8-12 turns. Small inductance coils make for much guess work.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Cd4049 Amplifier
    Ups 5Volt Circuit
    New latest Simple SWR Meter 2.4 GHz 20 dB Directional Coupler
    SMD FM Transmitter
    Digital 5V Power Supply using L296
    140W Amplifier Circuit ( 2x 70 Watt ) Schematic Diagram
    standard operational amplifier op amp circuits
    555 tlc555 relay driver circuit
    Simple short range portable FM transmitter circuit diagram
    STI5211 Low-cost HDTV Satellite Set-top Box Decoder For Microsoft VC-1 H.264 And MPEG-2
    pololu high current motor driver



    Top