I just found (to my surprise) that Active carries those ferrite beads that we see on all the MOTM modules. I've been using beads that I got from Mouser for my Oakley boards and although they work fine, they are a bit long. These ones at Active are identical to the ones we get in the official MOTM kits, right down to the white splotch at the core (viewable from one side only). Part # BL01RN1-A62, $1.99 CDN for a bag of 10 Active are in Canada, but they are in cahoots with Future Electronics in the US. I tried searching for this part on the Future Electronics website but it was down.
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Another source for ferrite beads
2002-12-10 by Scott Juskiw