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Re: Copper Banding?

Original poster: Kurt Schraner <k.schraner@xxxxxxxxxxx>

Tesla list schrieb:
Original poster: "Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx>

The reason is that a flat spiral made with tape acts as a stack of coupled filamental coils. If the coupling were unitary, the inductance
would be the same of a single filament. But as the coupling between distant filaments is smaller than one, the inductance decreases.
Consider for example two parallel filamental coils with inductance L.
If they are at small distance, they act as a single coil with inductance
L. If they are far apart, the coupling between them is insignificant,
and the total inductance falls to L/2.
Antonio Carlos M. de Queiroz

Thanks Antonio, for the nice and convincing explanation. My guessing about influence of interturn capacitance is of no value, and should be forgotten.

Kurt Schraner