Simple Radio Transmitter Circuit. The main theme of this simple fm transmitter circuit is to build it with minimum available components without using inductor coil and variable capacitor and yet make it work to its maximum potential. This little circuit can put out about 1 2 a watt rf on 160 80 40 or 30 meter amateur radio bands or any frequencies in between and close by including the infamous shortwave pirate radio band found under the 40m ham radio band.
In the schematic you will see the components required for making an fm transmitter the transmission range of this circuit is approximately 10 20 meters. It s basically based on a superregenerative audion receiver circuit where the use of minimal components becomes the main feature of the unit. The main theme of this simple fm transmitter circuit is to build it with minimum available components without using inductor coil and variable capacitor and yet make it work to its maximum potential.
This circuit is designed with limited power output to match the fcc regulations and still produces enough amplitude modulation of voice in the medium wave band to satisfy your personal needs.
The main theme of this simple fm transmitter circuit is to build it with minimum available components without using inductor coil and variable capacitor and yet make it work to its maximum potential. The components required to build this project is listed below sn74ls13 4 input nand gate schmitt trigger lm386 audio amplifier. The frequency mainly depends on the positioning and the values of the inductor c1 c2 and c3. This circuit is designed with limited power output to match the fcc regulations and still produces enough amplitude modulation of voice in the medium wave band to satisfy your personal needs.
