Top of Winding Bottom of Winding

Original spiral wound PF-1 Winding

All transitions line up in one direction

Splice joint needed to connect a pair of windings

Cross-over at top of coil for each winding pair

Coil winding approach that minimizes field errors

Inside winding pair

Outside winding pair

Top of winding

Bottom of windingFor the 4 turn coil transitions cancel on the bottom and leads provide some cancellation on top.

Minimum field error PF-1 Winding, 4 x 18

Original spiral wound (10 x 8) PF-4 Winding

All transitions line up in one direction

Top of windingBottom of winding

Minimum field error PF-4 Winding, 8 x 10

For the 8 turn coil transitions cancel on the bottom but line up on the top.