2014-06-22 Ferrite Core Crossreference

Here is a handy (but limited) cross reference of various core materials from various manufacturers.  The material type, such as 43 or 73, applies to types of cores other than toroids.  The Fair-rite 2673002402 uses 73 material and makes a very good choice for a Joule Thief core.  Another choice is the 2643002402, which uses 43 mix, but has lower permeability and takes more turns for the same inductance.

http://palomar-engineers.com/ferrite-products/ferrite-cores/toroid-cross-reference

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