Inquiry (采购产品): Need a coil I need a coil similar to this one Toroid Coil 2,000 turns List of Materials: One Ferrite Toroid Coil Core, 3.50” OD x 2.00” ID x .500” Thick (National Magnetics Part #: 995). Copper Magnet Wire, Teflon coate4d, Heavy Build, 23 AWG, 550 Ft (MWS Wire Industries, must be custom ordered) If I calculated it correctly 23478.68 uH **** Hidden Message ***** David Jefferson DC 20008 USA Company: Univ of DC Phone: 301-775-0512 Fax: dkjeff@comcast.net E-mail: djefferson@udc.edu **** Hidden Message ***** djefferson@udc.edu