in one of my electronics classes, as a group we have to design and build a transmitter and receiver to transmit and receive morse code. we can only use a tesla coil and/or a spark gap for transmission. since we have 3 in our group... i am making the spark gap, someone else - a tesla coil, and the thrid - a receiver to receive frequencies from both the tesla coil and the spark gap. i was wondering if anyone has advice or at least a good link on how to build a spark gap with a good explanation of what is being done. i am also only supposed to use 50V. thanks for any suggestions.