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Presented here is a 1.5 Watt FM Transmitter. A transmitter is an installation in which electrical oscillations are generated by an antenna as radio waves are emitted.Although there are a variety of channels exist in terms of size, application and frequency, each transmitter is an oscillator is present (usually crystal controlled) that an electric thrill, the carrier, with a constant frequency electricity.This is followed by one or more selective amplifier stages tuned oscillation circuits, which usually frequency multiplication is performed.Modulation can occur at low power, and even strengthening of the modulated signal to the power required to reach.Modulation can also occur at high power, when the carrier signal and separately reinforced.
The oscillator, "Step 1" consists of no less than three universal RF transistors: the BF199.These together provide enough power to the buffer, "Step 2" to drive.If the buffer transistor is in a 2N3866 which is able to deliver even 1.8 watts.This gives you only if you have the full voltage of the transistor on it.In any case, make sure you cool it well with a koelster.Wij usually use 12 or 13.8 volt power supplies.Power from an old PC to work well here because they usually already well shielded, cooled and stabilized.
Schematic of 1.5 watt FM transmitter:
Please note that the need for an antenna, a piece of coax or a dummy load to the antenna output to connect.If you do not turn on the transmitter and then it is extremely likely that the 2N3866 burns.
Related Links
Downloads
1.5 Watt FM Transmitter - Link
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