Java Toroid Design Applet
Courtesy of Jack Ponton, GM0RWU
This applet designs a toroid coil. Handbook data
for the most usual sizes and material combinations have been included.
Less common combinations estimate AL from permeability. Some
materials are not available in larger core sizes.
Enter the required inductance in the green box; you
must press "enter" at the end of the number. Then select size and material.