Re: Why tesla coil is air-cored to operate efficiently at high freq?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: dave pierson <davep@xxxxxxxx>


> This is not necessarily true... Assuming reasonable linearity, all
> that a core does in an inductor is to increase its inductance for
> a given shape and number of turns.

   And increase the losses, due to eddy currents, (amount depends on
    core material and frequencies of interest

> The current grows exactly as in an air-core coil, more slowly due to

> the higher inductance.

   And the slowere response time of the core, depending on the
   material.

<>>But in a transformer, if the magnetizing inductance (the inductance of
>the primary coil) is increased, the transformer works more close
>to an ideal transformer, and so a core is a good thing.
   If the associated losses and frequency reponse limits are acceptable.
   best
      dwp