P.I. coil capacitance

[James]

I was wondering if anyone has ever looked a commercially made coil (inside). I was curious how the folks minimize the capacitive coupling between the windings. I built the PI-1 in George Overton and Carl Moreland book. The detector works very good, but just curious about other coils. Thank you for any information, have a enjoyable summer. Jim

[ivconic]

[ivconic]

Minelab DD coil.
Pay attention on wider coil, it is done with litz wire:

[James]

Thank you for the pictures and the information, very interesting, Litz wire makes perfect sense. Thanks again Jim