a video for jetijs
YouTube - MIT Physics Demo -- Resonant RLC Circuit
this is a RLC demonstration done by MIT that i believe shows what you are describing in your last post
YouTube - MIT Physics Demo -- Resonant RLC Circuit
this is a RLC demonstration done by MIT that i believe shows what you are describing in your last post

As for the conical coils, you can get them from the older CRTs. I'll go take a picture of one and add it in here.
Does groundloop recommend any other suitable parts? 
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