Re: [Fwd: Iron Cores]

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

Original poster: "rob by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rob-at-pythonemproject-dot-com>

Tesla list wrote:
> 
> Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<evp-at-pacbell-dot-net>
> 
> Tes>  > Never knew about the iron core secondaries,
> >
> >         Experiments with Currents of ....
> >         Possibly in the patents.
> >         My impression is that he moved away from them.
> >
> >  > but was just the other day wondering if an iron core primary
> >  > and iron core secondary (separated by non conductive material)
> >  > would act differently than any other coil.
> >
> >         Lossier, maybe.  Maybe overcoupled.
> >
> >         best
> >         dwp
> 
>         That's a neat design, with enough info to build one.  Why doesn't
some
> one give it a go?
> 
> Ed

The eddy currents in steel (and other losses) rise dramatically at
higher frequencies >10khz perhaps.  Thats why ferrite or iron powder
cores are used in HF receiver and transmitter work, and flybacks. Their
conductivity is much lower.  See the list archives for my experiments
with a ferrite rod inside a small coil.  Rob.

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