I am creating an experiment to show how wireless energy can be transferred through resonantly tuned lc circuits. In order for this to work i need an oscillator. I have been told to try a colpitts oscillator. I have looked online and found a few sites showing calculators and schematics for these oscillators but I am having trouble in a few places. http://how-to.wikia.com/wiki/How_to_build_an_oscillator_circuit and http://www.ekswai.com/en_cap3.htm show the diagram but dont show where the positive and negative terminals are for the dc power into the oscillator and where the output is. Where are these things?? On the wiki page it has a diagram for a 50 MHz oscillator and I am probably looking for only a few MHz.