Build a 18w FM Transmitter. Here's a transmitter for commercial FM band provides up to 18 watts of power. Entering an audio signal 1 Vpp standard , which may come from a mixer or stereo coding stage , this system can cover an entire medium of low houses people or an entire neighborhood in a city. If required you can build more power and interconnect output stages to increase the coverage area of the station. Since the electronic diagram is too wide for placement on screen we decided segregated into two , in order to be seen without the need to move from side to side of the screen. The point where we cut only two drivers ( represented by A and B ) which are marked with arrows. See the Complete Circuit Diagram The Coils and Shocks Should Be Made According to the Following Table: L1 ------- 3 Turns on ferrite of 5x10mm L2 ------- 3 Turns on air 9mm ( 10mm long ) L3 ------- 1 Return on 12mm air L4 ------- 4 turns on air 9mm ( 12mm long ) L5 ------- 2.5 laps ...