Sensitive FM Transmitter

This is a very sensitive FM transmitter that can be used to spy .C6 is an optional RF bypass capacitor that may help improve performance and increase range . L1 is 1 uH inductor which can be made by 6 to 8 turns of 22 ga. hookup wire close wound around a 1/4 inch diameter non-conductive core , such as a pencil.

Reference : " Cyber Circuits "

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