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by tozapeel on March 22nd, 2007

tozapeel

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How to make radio transmittrers?

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  • by neokantian on March 29th, 2007

    neokantian

    You want simple? Let's say you were stranded in a car, and there was no one around from whom to get help. What could you do without a cell phone or other manufactured transmitter? Well, in the old days, you could take the spark coil out of your Old Ford (or whatever), connect your battery to the ends with wires, one of which is broken in the middle, then take a bit of wire on one end of the coil for an antenna. Then, assuming you know some Morse Code, you could send out a message that WILL be heard if anyone is listening to a radio of some kind. This is called a Spark-Gap transmitter. It covers such a wide band of frequencies that it would be hard to go un-noticed. The emergency construction and use of one of these has actually brought help and saved lives in the past. That's simple (if your car is old enough ;)

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