Re: TC power input vs size, was Fast ground rod

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Rick W by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rickwilliams404-at-earthlink-dot-net>

List,

Just a thought.
Bigger coils have inherently lower resonate frequencies. Therefore the
bottom end (primary tank) must become larger, that is, the tank cap and
primary winding values increase. A small coil may resonate at 400+Khz where
a 10nF tank cap may suffice. A larger coil resonating at 50Khz will require
a much higher cap value, like 80nF or better to retain the resonant
frequency.

With BPS remaining equal it will take more current to charge the larger cap.

On that note I've read that a lower resonant frequency is better than a high
one but I can't testify to that.

Rick Williams
Salt Lake City


----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, July 27, 2001 11:25 AM
Subject: Re: TC power input vs size, was Fast ground rod


> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<FutureT-at-aol-dot-com>
>
> In a message dated 7/26/01 10:51:18 PM Eastern Daylight Time,
> tesla-at-pupman-dot-com writes:
>
> > Original poster: "Gregory Hunter by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <
> > ghunter31014-at-yahoo-dot-com>
>
> Greg, all,
>
> I wouldn't go so far as to say that wallplug power is the sole
> determinant of spark length.  My equations are designed for
> an optimal coil design and size.  In other words, the best size
> coil for a particular power level should be used.  I suspect that
> if you put a little bit of power into a huge coil, you'll get no spark
> output at all.
>
> John Freau
>
> >
> >  Hi Godfrey, All,
> >
> >  You weren't the only one laboring under the
> >  misconception that bigger coils needed bigger power
> >  supplies. I remember the same series of posts. I think
> >  I was even a contributor. So wallplug power is the
> >  sole arbiter of spark length? Oh well, live and learn.
> >  Gotta run now, I've got a project going in the garage.
> >  I'm going to wind a secondary with welding cable
> >  around a 55 gal plastic drum, and fire it up with an
> >  OBIT.
> >
> >  Regards,
> >
> >  Greg
>
>
>