Re: Crushing ferrite cores to make one big one?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net> 

The permeability of ferrite cores is typically much lower than that of
steel, so you have a problem getting enough inductance with a reasonable
number of turns.  Then, too, you have a saturation problem, too, once you
have all those turns, depending on the material.
Powdered metal is a bit better for lower frequencies, but still has the same
problems.

If the cores are the kind used for EMI filtering (as opposed to, say,
transformers in power supplies), they're also quite lossy (by design), since
they work by absorbing the RF energy more than by reflecting it back.

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, February 14, 2004 11:01 AM
Subject: Crushing ferrite cores to make one big one?


 > Original poster: "Hydrogen18" <hydrogen18-at-hydrogen18-dot-com>
 >
 > I've been on the prowl for cheap transformer cores recently and something
 > just occured to me. I have TONs of ferrite cores, and they are amazingly
 > cheap to obtain in large weight. what If I just took and ground them up,
 > then say filled a 3 inch PVC pipe with them? I could use this as a core
for
 > a fairly large 60 Hz transformer couldnt I? Any thoughts on this somewhat
 > crazy idea?
 >
 >