[time-nuts] magnetic electronic components

Tim Shoppa tshoppa at gmail.com
Tue Jun 23 07:25:57 EDT 2015


"Experimental Methods in RF Design" has a half-dozen pages specifically on
the choices of powdered iron and ferrite materials, and lots of working
circuits and designs with measurements. Aka EMRFD.
http://www.arrl.org/shop/Experimental-Methods-in-RF-Design

Here in the USA, iron powder and ferrite cores of many different materials,
sizes, and a few shapes are available from Amidon and kitsandparts.com.
Many useful ferrite cores for multi-turn transformers and chokes, are sold
as "EMI beads" by Mouser and Newark and other mainline distributors. I
don't know too much about easy availability in EU.

Tim N3QE

On Mon, Jun 22, 2015 at 3:02 PM, Attila Kinali <attila at kinali.ch> wrote:

> Hi,
>
> I was looking up some stuff and realized (again) that I don't know
> anything about how magnetic electronic components (inductors/solenoids,
> transfomers, baluns, ferrite beads...) work. Yes, I can calculate
> the inductance, I know how to get from the AL value to number of
> windings. But I don't know anything about the practical issues
> or where they come from. Unfortunatelly, this knowledge seems to
> generally rare among EEs (at least everyone I asked in the last
> couple of years) and books about it are either long out of print
> (with no pdf available) or more geared towards the physics student.
>
> So, does anyone have any recomendation where I could read up
> on this? Books, pdfs, webpages,... anything.
>
> Also something that covers more the application side, ie how to
> use ferrite beads/toroids to build devices, would be appreciated.
>
> Thanks in advance
>
>                         Attila Kinali
>
> --
> I must not become metastable.
> Metastability is the mind-killer.
> Metastability is the little-death that brings total obliteration.
> I will face my metastability.
> I will permit it to pass over me and through me.
> And when it has gone past I will turn the inner eye to see its path.
> Where the metastability has gone there will be nothing. Only I will remain.
>
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