[sdiy] coil saturation

[John L Marshall]

Nils,

As an experiment you might try a small interstage or modem transformer. Even
a small tube type output transformer or a filament transformer could work.

Purified iron can have a permeability of 180,000. Supermalloy will have a
permeability of 800,000

Wire size =  current handling and DC resistance. DC resistance will affect
Q.
A small core will saturate more easily.

Take care,
John


----- Original Message -----
From: Nils Pipenbrinck <np at inverse-entertainment.de>
To: Synth DIY <synth-diy at dropmix.xs4all.nl>
Sent: Tuesday, April 23, 2002 12:09 PM
Subject: [sdiy] coil saturation


> 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? 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
>
>
>
>
>
>