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MIC Bias Circuit-1.5km Single-Tube FM Radio MIC Transmitter

2016-04-06 19:04  
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MIC Bias Circuit-1.5km Single-Tube FM Radio MIC Transmitter Circuit
The picture 1 is a typical 1.5km single-tube FM radio MIC transmitter circuit. This circuit's key components is emission triodes which always are the D40, D50, 2N3866 and so on. Its working circuit is 60-80mA. In amateur case it is easy to make a successful low-power radio circuit with 88~108MHz FM frequency range. This circuit has sinple single-tube transmitter circuit and also uses the integrated stereo transmitter circuit. It is mainly used for FM radio headset, wireless telephone recording forwarding, remote control, wireless alarm, monitoring, data ransmission and campus FM radio and so on.