Re: 8 kHz Tesla Coil

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>

At 09:32 AM 9/20/2005, Tesla list wrote:
> Original poster: "Mike" <mike.marcum@xxxxxxxxxxxx>
>
> Maybe putting it in oil will lower the freq. some too and insultate 
> it. The more I think about it, why not just fill the form of a 
> regular coil with powdered iron or whatever they use at 5-10 kHz? 
> The coil form walls would have to be unusually thick (1" acryllic?). 
> Finding a source of a few hundred pounds of the stuff would be tough 
> tho. Guess the ferrite/powdered iron core companies is who I'd check 
> first. Seems like giant wire (12awg+) wouldn't be needed unless you 
> were dumping 50 kw+ into it. Probably need that much for breakout on 
> a huge toroid tho. Maybe a regular-sized toroid with a giant inductance?
>
> Mike
> ----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Monday, September 19, 2005 2:52 PM
> Subject: Re: 8 kHz Tesla Coil


Folks, now you're just building ordinary high voltage transformers, 
albeit resonant.

Commercial resonant HV test sets do just this sort of thing.

Charlton, et al., built 1MeV Xray machines with large resonant 
transformers at 180 Hz, using just what you are contemplating.. 
stacks of flat windings, very well insulated iron cores, oil tanks, etc.

You can buy, off the shelf at remarkably good prices, air core tape 
wound inductors for use in speaker crossovers.  They are laminated 
plastic in between the turns, so should have decent HV properties.  I 
can't remember the company name, but it's in the archives somewhere 
in the last few years.

Maybe http://www.alphacore.com/