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Show FM transmitter with two VHF circuit

2016-04-03 14:41  
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The following shows the FM transmitter with two VHF circuits. The circuit is very simple, and very practical. Recommend Duokanjibian The schematic in order to master this principle. I hope to be helpful to your work. In order to better grasp the principle, perhaps you may want to look at some of the important components of the circuit:  BC548 . This small transmitter uses a Hartley oscillator. Typically, the storage capacitor circuit connected to the base of the transistor, but in the VHF base-emitter capacitance of the transistor as a short circuit, so in fact, it still is. Turn wire wound coil is four quarter-inch of 18 swg before. Taps antenna is a half-turn from the supply side. Audio sensitivity is very good when using ECM microphone inserted. 

fm transmitter



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