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2 VHF band FM transmitter

2016-04-04 07:09  
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This article describes a 2 VHF band FM transmitter. The principle is simple there, we recommend that combine text carefully read the complete schematic. Figure: 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. To better grasp this principle, it is recommended to read several times on this principle.

fm transmitter


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