hole 310 is formed in alignment with respect to the longitudinal direction of the core bridge 75 and adjacent the outer edge of the core 15 20 25 the hole 310 is formed in the illustrated location because that location of the core has a lower flux density than other portions of the core as measured or determined prior to forming the hole 310 in the stack of laminations 305 in other words as determined from a core without the hole 310 therein as a consequence adding or forming the hole 310 as illustrated in fig7 increases the flux density around the hole 310 however the impact of forming the hole 310 as illustrated has limited negative or detrimental impact in the operation of the inductor 300 in addition the radius 80 between the core bridges 75 and legs 35 that provides additional mechanical support between the core legs 35 and bridges 75 fig2 is not required even though it may be present in the construction of the cores 15 20 25 of inductor 300 this particular feature is not necessary because the metallic laminations 305 have enough strength without the radius 80 as shown in fig3 fig8 and 9 illustrate an inductor or filter 400 according to a fourth embodiment of the invention the inductor 400 includes many features in common with other inductors described in this application and common elements have been given the same reference numerals accordingly reference is made to other inductors described in this application for additional features and alternatives to the inductor 400 and the following description makes reference to.