Here is a portable good quality sensitive FM receiver circuit or FM tuner circuit. The circuit is build around the TDA 7021T IC which is a FM radio receiver IC. The IC requires only few external components and the required voltage is only 3 volts. The audio output is low so we have further further
amplified it with LM386 amplifier IC. You can also use other high power audio amplifier with it to increase the audio more. A high frequency tuned antenna amplifier circuit is used at the antenna input section of the circuit for increasing the sensitivity. You can change the frequency with the help of 25pF vairable capacitor. The Coil L1 is an air cored coil equal to 5 turns of 1mm silver plated wire wound on 4mm form.
This FM radio circuit is very portable and can be easliy fit in a small box with batteries.
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