Hello, I'm looking to build a metal detector. I shant get into all aspects of it, just the first for now. I have a BSc Physics so you can get mathematical if you want but not much electrical experience. I need an LC circuit to build a beat frequency oscillator metal detector. It should output ~100kHz but I don't even know where to begin looking for one online. Know how you can get circuitry kits online? What is this type of unit even called?? Also I want to be pumping quite a bit of power through it so I'd need a beefy one. Any help would be great.