1 watt PLL portable fm transmitter circuit

Posted on Feb 7, 2014

This Simple Portable FM transmitter includes a limiter, a microphone amplifier and a PLL digital tuning. All the components are placed on one circuit board. The RF power is switchable between 1 W (HI) and 0, 2 W (LO). The schematic diagram is split into 3 parts: RF part (numbered from 1), PLL (numbered from 30) and audio part (numbered from 50). Co

1 watt PLL portable fm transmitter circuit
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nnect a 6 V / 0, 1 A bulb to the output and set the correct frequency on PLL. Set the RF power to HI. currently activate the transmitter. you must tune it on a receiver. perhaps you may stretch coils of the L1. Fix the L1 in position when the tuning voltage (on Q3) is in range 4-9 V. Then use C15, C16 and C17 to regulate the best power (the highest light of the bulb). Then you`ll be able to connect antenna and audio signal. change R1 till the audio sounds as loud because the alternative stations.

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