fm am mw sw antenna amplifier


Posted on Feb 6, 2014

Here is a schematic of FM, AM/MW and SW antenna amplifier circuit or we can also say it antenna preamplifier circuit which can be used to increase the faint signals of FM, AM/MW & SW bands. The circuit is very simple and easy to build using only one transistor MPF 102 and few other components. But if you didn`t found MPF 102 transistor then you ca


fm am mw sw antenna amplifier
Click here to download the full size of the above Circuit.

n use NTE 451 or 2N4406 as substitutes. For L1 use 470uH coil for AM and for shortwave use 20uH coil. This circuit can be powered with a 9V alkaline battery or if you are using power supply then bypass power supply with a 0. 04 uF capacitor to decrease noise. Antenna can be a 18 inch telescope or 18 inch thick piece of copper wire.




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