john.brewer@us.schneider-electric.com wrote:
> I am looking for a ferrite rod to wind a filament choke on. Does anyone know
> a source for small
> qty? Needs to be about4 1/2 to 5" long.
I guy in Lithuania is selling .5 by 7.5 inch rods of unknown Russian
ferrite on eBay (and also some smaller ones). I have some coming.
Surplus Sales of Nebraska has a few:
http://www.surplussales.com/FerRods/FerRods.html
Amidon may still sell some. Here is an information page on their
stock and rods, in general:
http://www.amidoncorp.com/aai_ferriterods.htm
But the lowest cost source, by far is assembled rods made from large
ferrite beads made for EMI suppression. There is also a wider range
of materials from low frequency, high permeability (good to about 1
MHz, the most common that works well to about 10 MHz and high
frequency material that works well to above 30 MHz. Digikey sells
these from 3 or more companies, with the largest stock from Steward.
http://www.steward.com/
Lapping the ends of the beads flat improves the approximation of a
solid rod.
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