1.5W 1-2公里调频发射电路（英文）-----1.5 Watt 1-2 km Range FM Transmitter
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1.5 Watt 1-2 km Range FM Transmitter
Description
Here is a well designed FM transmitter circuit that works effectively in 1 - 2 km range.
Input source is an electret condenser microphone and signal gain can be adjusted by using the potentiometer P1. You can easily prepare the PCB by using any PCB editor and apply it to the board by using the ironing method. The coils and the antenna can be designed as a part of the PCB made up of the copper area.
Parts List
R1=220K R2=4.7K R3,R4=10K R5=100ohm | C1,C2=4.7uF Electrolytic C3,C4=1nF C5=2-15pF C6=3.3pF | Q1=BC547C Q2=2N2219A P1=25K MIC=Electret Condenser Type |
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