FerroMagnetic Cores

• Introduction
• Choice of material
• What size toroid core
• Using the data tables
• Winding hints
• Line filters and chokes
• Switched mode supplies
• Variable coil forms
• Suppression beads
• Bobbin core
• Balun cores and rods
• Core cross references
• Toroid Q plots
• RFI suggestions
• Magnetic formula
• Links
• RF transformers
• Programs

with thanks to Ron Sanders VK2WB for the following information

formerly from the website of:

RJ & US IMPORTS

Have ceased trading but have
kindly made this data available for use
by experimenters and others with
an interest in the applications of
ferromagnetic materials and cores