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Build a 9V Wireless Microphone FM Transmitter
Build a 9V Wireless Microphone FM Transmitter
This FM transmitter schema can be used as a wireless microphone, can be received by an ordinary 88- to 108-MHz FM broadcast receiver. For the power supply, this transmitter schema is powered by a 9 V battery. To comply with the radiation limit of FCC rules, keep the antenna length under 12 inches. L1 is 6 turns of #24 wire wound around a pencil or a 1/4″ form, with turns spacing of 1 wire diameter. C6 is a gimmick capacitor which has value about 1 pF.
9V Wireless Microphone FM Transmitter Circuit Diagram
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