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 can 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.