Simple FM Transmitter

695

07:36:55

It works pretty good. I built it. For coil, .08mm enamel coated wire, with 4-5 10mm turns. The 10pf cap following the transistor is adjustable. Power with a 9 volt battery. Input line level audio. Search the FM band with a radio. Only drawback is that it is mono. 

published 11 years ago

stevecg2

11 years ago

The adjustable 10pf cap is the one that goes to ground after the transistor.

hurz

11 years ago

In this configuration it oscillates with about 580MHz

Khalids

11 years ago

Where is the antenna?

Secuture

11 years ago

Friend of mine build once w time similar transciever but use more advanced construction to achieve a whole one watt of emission power. On second day after he start test transmissions a police take him in the morning. Beware of build transmitters more than 20mW of power whose use commercial radio frequencies.

stevecg2

11 years ago

antenna is above 470ohm resister. Only built for fun, only on for a minute.

venkat0089

11 years ago

What is the transistor used

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