Ferrite Toroids

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

This is low permeability (<300) custom ferrite mix used by Balun Designs for most wire wound designs.  The permeability is the best for most wire wound baluns and ununs.  Can be used bare or inserted in Teflon tubing for greater voltage...