Ferrite Toroids

This is a mix 43, medium permeability toroid best for moderate power (<= 500w) EFHW designs and choking above 40 MHz.

This assembly is a double stack of mix 31 toroids, a high permeability mix used by Balun Designs for many coax wound 1:1 baluns. High permeability suppression mix provides excellent choking performance but should be used with 1:1 ratio baluns only...

This assembly is a double stack of medium permeability mix 43 toroids. Best choice for medium to high power End Fed Half Wave transformers (=< 1kW)

This assembly is a double stack of a low permeability (<300) toroids, a custom ferrite mix used by Balun Designs for most wire wound designs. This mix is the best choice for a coaxial wound suppression/choke balun used from 7-54 MHz The low...

This is low permeability (<300) custom ferrite mix used by Balun Designs for most wire wound designs.  Best permeability for most wire wound baluns and ununs. Not recommended for EFHW. Can be used bare or inserted in Teflon tubing for very...

Full size (2.4") mix 31 ferrite with white identifying color and surface sealer/coating that provides excellent long term weatherproofing.