Re: 8 kHz Tesla Coil

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Maybe next step is to try a 16x80 inch secondary with the 24x80 
toroid and see what guage wire is needed to get 8 KHz.  If high 
voltage is the result of such a coil, more height than 30 inches will 
be required.

Gerry R.

> Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>
>
> Hi Bill,
>
> Tesla list wrote:
>
> > Original poster: William Beaty <billb@xxxxxxxxxx>
> >
> > On Fri, 16 Sep 2005, Tesla list wrote:
> >
> > Large resistance per inch of secondary, so lower Q than normal, less
> > resonant rise, and broader band output.   But are these values
> > UNREASONABLY low?
> I guess that depends on what you want to do with the coil. If it's 
> just to produce sparks, probably not a problem. Other tid bits have 
> changed, but I'm a firm believer that any obstical can be overcome. 
> For some other purpose, who knows. I can tell you however, Javatc 
> thought this coil needed at least 8 awg wire on the secondary. That 
> is from skin depth formulae, so there is quite a bit of loss in a 
> coil down to 40 awg. Kind of intersting regardless.
>
> Take care,
> Bart
>
>
>
> > >
> > > Take care,
> > > Bart
> > >
> > > Tesla list wrote:
> > >
> > > >Original poster: Ed Phillips <evp@xxxxxxxxxxx>
> > > >
> > > >Here's the design of an 8 kHz TC I whipped up last night:
> > > >
> > > >Diameter:  8 inches, height: 30 inches
> > > >
> > > >101,182 turns of #40 SF wire
> > > >
> > > >Wire length 21,327 feet, weight 0.66 pounds, DC resistance 2237 2 ohms
> > > >
> > > >Inductance 4.1896 henries
> > > >
> > > >Self-capacitance 14.5 uuFd
> > > >
> > > >Resonant frequency unloaded 20.4 kHz
> > > >
> > > >Toroid top load 72" OD, 24" tubing, capacitance ~79.2 uuFd
> > > >
> > > >Resonant frequency loaded = 8.04 kHz
> > > >
> > > >     Who wants to build it?
> > > >
> > > >Ed
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> >
> > (((((((((((((((((( ( (  (   (    (O)    )   )  ) ) )))))))))))))))))))
> > William J. Beaty                            SCIENCE HOBBYIST website
> > billb at amasci com                         http://amasci.com
> > EE/programmer/sci-exhibits   amateur science, hobby projects, sci fair
> > Seattle, WA  206-789-0775    unusual phenomena, tesla coils, weird sci