how i can make a circuit of FM transmitter in range of 5 Km.?

PLZ help me to make a FM Transmitter in the range of 5 Km. with a easy way

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can we operate electronic lock from fm transmitter???
Re-design6 years ago
Buy a kit from Ramsey. You may be stepping over the legal limit on unlicensed power though.
jj2011 (author)  Re-design5 years ago
Can you explain more about the kit???

Check out this page.  THey come with full instructions and are easy to assemble.
jj2011 (author)  Re-design5 years ago
Kiteman6 years ago
If the broadcast range of your transmitter is more than a few metres, you count as a radio station and need a proper license to broadcast.

Why do you need to broadcast 5km?
FoolishSage6 years ago
Most countries have strong restrictions FM transmitters. Personal use is usually limited to a few meters. To be allowed to transmit to several kilometres you often are required to have some form of radio station permit.

As to how to physically get that kind of range: Bigger antenna and more power I would guess but I can't help on the details.