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Re: This phase shift stuff...
Tesla List wrote:
>
> Original Poster: "Jim Lux" <jimlux-at-jpl.nasa.gov>
>
> > So what kind of REAL Tesla coil system can I put together that
will show
> > all that phase shift, 1/4 wave, and transmission line effect stuff?
> > Perhaps, it is a forgone conclusion that the secondary voltages and
> > currents are pretty much in phase within a Tesla coil (there really is a
> > "little" shifting). However, if anyone has a major exception, I have the
> > resources ready to pour into reproducing and studying this exception. It
> > is time to put this matter to rest once and for all...
>
> Just a thought, but what about a helical resonator configuration... Craggs
> and Meek describe them in a Tesla coil context. Essentially they are a
> helix in a can. Relatively few turns, compared to the several hundred or
> thousand in a classic TC. However, they are small compared to a wavelength
> in free space (I have some helical resonators for 137 MHz and they are
> about 1 cm long, roughly lambda/200).
>
> One of the problems will be insulating the HV end from the surrounding can,
> but you should be able to run at lower voltage to make your measurements,
> and perhaps fill the can with oil?
A Tesla coil is indeed a helical resonator, but not a shielded one.
The same basic design rules apply.
Ed