On 12/8/2018 7:37 PM, Don wrote: > Sure u want 31 vs 43? Absolutely #31. Note that ferrites are one of the products subject to recent tariffs, and most are mfd in China. Most of Fair-Rite's factories are in China, and the boxes for #31, #43, and #75 cores I've bought this year all showed China as their point of origin. 73, Jim K9YC