My problem is that I am trying to, in this case, send a 50 KHz signal through an LC circuit to a receiving coil (very short distance by the way) so that the secondary coil can power an ipod. It's more so a first attempt and an experiment because the 50 KHz isn't a very powerful signal but I am fairly new to the realm of electronics and while I understand these concepts I don't really know what options I have. Any suggestions? I have heard of op amps and even integrated function generators. And are sine waves better to use than square waves for this? I'm assuming so. I want to be able to make it so that I can gain some experience from it instead of it coming out of an expensive function generator. And I would also need to send across a good bit of voltage due to losses in efficiency concerning that it is my first attempt. Thanks you guys!!