Loublet Schematic

This is a wireless microphone schema which transmits the FM frequency and uses a coil on the printed schema board itself. This transmitter has a good frequency stability, its sensitivity is excellent and audio consumption is about 30mA. The size of the PCI board is 25mm by 50mm.The power supply is made ​​by a 9V battery. and its range can be more than 100 meters.

To improve the transfer transistor 2N2222 use in place of BC547.You have to remove the 4K7 resistor if you use a dynamic type microphone.