The coils are made out of magnent wire which are covered in enamel skin. That is why the ends of the one that have the leads bent are black. Yes the wires have to touch and they have to touch very tightly so that the magnetic field is created.Originally posted by Squeezer:
<STRONG>Since the thread got closed, I'll open this new one.
It looks like the wires you wound are touching in the coil. Wouldn't that create a short and make the inductor useless, or are the coils seperated by the hot glue (I can't tell in the pics)</STRONG>
You can not use pvc jacketed wire and expect to get a coil that will work very well.