FM Transmitter - 3 km Range

@bpanem

6 years ago

https://everycircuit.com/circuit/5961526807363584

R1 @200Ω is the microphone. C2 in parallel with I1 @100nH is a variable capacitor tuneable from 0 to 100pF in order to vary the resonant frequency. The antenna itself is located at the node between C2 and C3 @50pF.