This is a small but quite powerful FM transmitter having three RF stages incorporating an audio preamplifier for better modulation. t has an output power of 4 Watts and works off 12-18 VDC which makes it easily portable. It is the ideal project for the beginner who wishes to get started in the fascinating world of FM broadcasting and wants a good basic circuit to experiment with.
Technical Specifications – CharacteristicsModulation type: …….. FM
Frequency range: …. 88-108 MHz
Working voltage: ….. 12-18 VDC
Maximum current: ……. 450 mA
Output power: ………… 4 W
First of all let us consider a few basics in building electronic circuits on a printed circuit board. The board is made of a thin insulating material clad with a thin layer of conductive copper that is shaped in such a way as to form the necessary conductors between the various components of the circuit
The soldering iron that you use must be light and its power should not exceed the 25 Watts
There are many different types of solder in the market and you should choose a good quality one that contains the necessary flux in its core, to assure a perfect joint every time
This is an RF project and this calls for even more care during soldering as sloppiness during construction can mean low or no output at all, low stability and other problems
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