I built an FM radio transmitter, How could I increase the distance that is broadcasts?
I built an FM radio transmitter (if you need the schematic I will scan it) and every once in the while use to broadcast some music. The problem is it only broadcasts within a very (I mean very!) short distance. How could I increase the distance?
I am pretty sure it is not the power, it is connected to a 3 foot wire, that is how it works.
HERE IS THE SCHEMATIC:
http://img201.imageshack.us/img201/9977/schematicgs1.jpg
1. Use a directional antenna to increase the output signal in the desired direction.
2. Adjust the impedance of your antenna. The circuit you describe does not include an output impedance adjustment, so you have to use/make an antenna that matches this circuit. If you have the antenna connected directly to the output, and the length of the antennae is 1/4 the wavelength of the frequency that you are transmitting at, you should get maximum signal transmission.
3. Get an RF amp. (But remember, the FCC limits the broadcast power you can legally transmit without a license.)
The amount of power you put into it? just a guess
References :
without a schematic all i can do is guess.
What kind of distances are you after, and what do you get?
Be aware that in the US, the FCC limits the amount of power you can transmit.
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References :
true the FCC does limit the max output, but i think the best way would be to buy/build a separate FM repeater.
References :
personal experience
I made an AM transmitter today, and i noticed that of i put a 5′ long antenna on the collector(i only used one transistor) it increased the volume, so idk if the distance would be increased too…
anywasy please give the schematic, i have been looking but couldnt find anything good
References :
1. Use a directional antenna to increase the output signal in the desired direction.
2. Adjust the impedance of your antenna. The circuit you describe does not include an output impedance adjustment, so you have to use/make an antenna that matches this circuit. If you have the antenna connected directly to the output, and the length of the antennae is 1/4 the wavelength of the frequency that you are transmitting at, you should get maximum signal transmission.
3. Get an RF amp. (But remember, the FCC limits the broadcast power you can legally transmit without a license.)
References :