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Is this a Toroid Bead and can it be used for a joule thief? Answered

I found it at the end of a power chord.

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lemonie

Best Answer 8 years ago

It's a ferrite thing, I've got one - it was on a cable at some point. Yeah, give it a go.

L

How about if my ferrite is big? should I make more turns??

.  It's not actually a toroid (donut) (check the first two links here), but it does appear to be ferrite. It probably won't work as well as a toroid, but it should work.