JavaTC v7.06 Update Was: I've noted a similar odd anomily......

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

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-uswest-dot-net>" <tesla123-at-pacbell-dot-net>

Hi All,

Thanks to Garry Freemyer pointing out the odd anomily in the javatc
program, the problem has been
corrected. The problem was in the Fine Tune function within the Primary
Design Structure. When the
Primary Fr and Secondary Fr were compared, the error % equation would calc
incorrectly if the
value of the Primary Fr was between 1000 and 1100.

I'm now using a slightly different method of comparing the two frequency's
and this has corrected
the error %.

I also changed the Fine Tune function to an Auto-Tune function. Although
similar, it is much
faster. If you start out at 1 turn on the primary (or 10, or 20, or
whatever), it takes only a
couple of seconds to find the calculated tap position.

JavaTC is now at v7.06.
 http://www.classictesla-dot-com/java/javatc.html

Thanks Garry for pointing out this odd behavior.

Bart A.



Tesla list wrote:

> Original poster: "Garry Freemyer by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <garry-at-ndfc-dot-com>
>
> Hmm, I've noticed something similar on a web site that had a program to
> calculate your tesla coil resonant frequency and tuning points. I don't have
> the URL with me right now, but it had a place to enter your dimentions and
> wire guage. It had a chart to look up wire diameters.
>
> I noted that it was showing that I needed a huge number of windings on the
> primary, on the order of 78 windings!! I had expected a figure between 8 and
> 18. It had a box to enter the number of primary turns and it was supposed to
> give you a percentage to increase and decrease it. It also had a fine tune
> button. I found that if I entered say 18 turns, it would say I needed to
> increase it by a huge number. I got a tune point of about 78 turns if I
> recall correctly. For giggles I entered ONE turn and it said to increase it,
> so I entered 3 and it said I needed to increase it 300% so I entered nine
> and it said I was in tune with the secondary at 9.3 turns.
>
> I don't know exactly why this program did this, but I learned that I needed
> to start at one or two turns and go up from there, or I would end up with it
> telling me I needed a LOT of turns.
>
> <Snip!>
>
> Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>"
> <FutureT-at-aol-dot-com>
>
> In a message dated 4/9/01 8:54:54 PM Eastern Daylight Time, tesla-at-pupman-dot-com
> writes:
>
> > >I have seen exactly that effect. I started with a smoothly running
> >  >coil, then tuned the primary down to enhance the lower sideband
> >  >response. Operation went from smooth to erratic but the sparks
> >  >increased considerably in length (about 20% from memory).
> >  >
> >  >Regards,
> >  >malcolm
>
> Malcolm, all,
>
> Snip ..