4W FM Transmitter with 2N2219


Posted on May 29, 2012

This transmitter needs heatsink at 2N2219. With the C4 we regulate the frequency. With their C7, C8 we adapt the resistance of aerial (practically to them we regulate so that it is heard our voice in the radio as long as you become cleaner).


4W FM Transmitter with 2N2219
Click here to download the full size of the above Circuit.

Parts: R1, R2=10KOhm R3=47Ohm C1, C2=1nF C3=4,7uF/16V C4, C7, C8=0~45pF trimmer C5, C6=10pF C9=100nF L1=4 turns, 7mm diameter * L3=3 turns, 7mm diameter * L4=5 turns, 7mm diameter * L2=RFC (resistance 1MOhm with wrapped around her inductor of enough coils from fine isolated wire. Scratch of utmost inductor and you stick in utmost the resistance making thus a parallel L-r circuit.) T1, T2=2N2219 ANT=Simple dipole l/2. MIC IN=Microphone dynamic or other type. (It can also connected to a cassette player unit)




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