Circuit Lake

Electronic Project and Circuit Collection

1W RF Amplifier for iPod Stereo FM Transmitter

04/30/2012 Category: Analog, Ham Radio

If you want enjoy and share your favorite music, you can connect your iPod, MP3 or CD player to some kind of FM transmitter. The transmitting signal then can be picked up by any FM radio receiver, most often used in cars. The problem with most FM transmitter is that they have very weak signal and short transmitting range.

This project explains how you can build and connect a powerful 1W amplifier to your FM transmitters. This is good solution for those wishing to listen to their favorite tunes in the car, house, garden, school, campus etc. The project consists of 3 stages amplifier. Stage 1 use Transistor MRF9411LT1, BFG193 for stage 2, and the last amplifier stage is based around the transistor 2N3866.

How far will it transmit?
Jeffrey D, as project designer, said that the transmitting distance is very dependent on the environment around you. If you live in a big city with lot of concrete and iron, the transmitter will probably reach about 400m. If you live in smaller city with more open space and not so much concrete and iron, your transmitter will reach much longer distance up to 3km. If you have very open space you will transmit up to 10km.One basic rule is to place the antenna at a high and open position. That will improve your transmitting distance quit a lot. Download Schematic and PCB.