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I recently built a Fly-back Driver with a fly-back transformer and a primary voltage input of 12 volts and the arcs are about an inch long ( i don't know the exact output voltage because I don't have the ability to measure it ). I have heard that in the 1900's they used arcs to transmit Morse. I want to replicate this. I am wondering how I would hook up the antennas to the arc and hooking up the ground and how the arc relates to all of this. I know that there might be some legal issues to this, but I live in the mountains far from many people, maybe a few FM radio users but I just want to test this for a second and I will not be continuously running this, in other words don't restrict me to information because of legal issues because I know the warnings. So how should I connect the arc up to ground and the antenna and is there any other components I need for this?

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aren't chaotic spark transmissions banned by international treaty? –  Grady Player Feb 27 '13 at 2:25
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im just going to do it for a second so it wont matter –  skyler Feb 27 '13 at 2:52
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The law is there for our benefit. The length of time you spend violating the law is not a factor, any more than running a traffic light only takes a moment. You can study to gain knowledge, without harming/endangering others. –  Optionparty Feb 27 '13 at 13:47
    
I bet you could just use an am radio, I remember hearing car spark plugs through an old am radio in my dads car. Also I am sure you wouldn't get in trouble as long as you aren't trying to use your device for communication, sparks aren't illegal, or most of the welding techniques would be outlawed. –  Grady Player Feb 27 '13 at 14:34
    
Major differences from a typical welding operation would be the intentional antenna - and perhaps the tuned circuit as well. The experiment can probably be conducted without an antenna, which would be somewhat more considerate. –  Chris Stratton Feb 27 '13 at 15:14

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up vote 1 down vote accepted

Wikipedi's pictorial 1000 words from here opines:

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And a very large number of references are here some even relevant.

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