On Sun, 12 Mar 2006 06:06:56 -0800 (PST), Michael Germino wrote: >Where is a good source for F-240 Ferrite Cores. (cheap) Do they come in the new 31 mix? www.fair-rite.com is the mfr. Click on their link to distributors. Be prepared to buy 20 or more for a minimum purchase, but at 1/3 the price of Amidon. Jim K9YC