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I have built a secondary coil for a tesla coil, and I used 24 gauge wire spaced with fishing line the same diameter as the wire.

I have found formulas for no spacing, but not encountered how to figure out inductance with spacing between the wire.

How can I calculate the inductance of the tesla coil if the secondary winding is spaced out instead of being right next to each other?

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Lots of reference material for calculating inductance. Wheeler's formula link here works well. The length of the coil in the equation takes into account your spacing between turns.

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  • \$\begingroup\$ thanks for the RFCafe link. Their Formulae and EE links page is amongst the best I've ever seen. RF focus but a large amount of other material. Superb. \$\endgroup\$
    – Russell McMahon
    May 20, 2014 at 13:02

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