[sdiy] coil saturation

[harry]

Hi Nils...

> > Hi there.
> >
> > For a "mad scientist style" experiment I need a very special inductor, but
> I
> > have not that much experience with "roll your own" coils.
> >
> > The inductance should be quite high, about 500mH, so I guess I need a
> > ferrite core. It should also saturate with ease, and yes, and a low
> > resistance would also be nice.
> >
> > What should I use? Thin wires?

More turns = higher inductance. You use wire big enough to handle the
expected currents

Small core is best... less iron saturates faster. Use a Toroid core for best
result... you might try a pot core or E-I core which would allow you to use a
bobbin
to wind on (easier). Avoid a bar core... they do not like to saturate.

Any gap in the core will make the saturation point much higher....

H^) harry

> Big wires? Large core or better a small
> one?
> >
> > What I'm about to do is to build a simple gyrator style filter, and drive
> > the coil into saturation by a running a constant current through the
> second
> > winding.
> >
> > Bye,
> > Nils
> >
> >
> >
> >
> >
> >

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