Re: how to transfer energy through the metal wall ??

"Ian Stirling" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> In sci.optics [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> > Dear all,
> >
> > I am doing a project. I would like to transfer several watts of
> > (electrical) energy through a metal wall (about 1 cm thick) and use
> > the energy to activate an electric device. I could put a coil on one
> > side of the aluminium wall, feed the coil with AC current, and pick up
> > AC current from the coil on another side of the aluminium wall. But
> > this method does not work with the steel wall efficiently enough.
>
> Al or Fe?
>

It may even be the Cu type of ...steel