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Re: [TCML] VTTC Coupling



I tried the 4" form  yesterday.  I scoped it out and there was certianly a
lot of interference.  This could be due to it being out of tune.  I'll have
to play with it more today.

On Mon, Sep 15, 2008 at 10:11 PM, DC Cox <resonance@xxxxxxxxxxxx> wrote:

> Yea, I've been short on 3 of the 5 major large US homebuilders for the past
> 4 years, and so far, in the past 4 years, up nearly 850%!!
>
> I think I will hold my short position in these stocks until next April,
> then
> dump it and cash in!
>
> I'm wondering after all the dust clears in the next 24 months if the tech
> stocks will run rampant again, like in the 80's?  There is a ton of money
> out there just waiting for that stampede to reoccur.  I know Buffet is
> playing the energy sectors very hard right now.
>
> I would suspect that a coupling of around 0.18 to 0.2 would be the max for
> good performance.  I had a pair of 811As in a VTTC once and set my coupling
> at
> 0.18.  I also tried tighter coupling but the spark output actually
> decreased. I think the energy reflected back into the primary circuit
> started showing modes
> of constructive and destructive interference hence decreasing the output.
>  I
> noted values of 0.14 to 0.18 seemed to produce the very best results.
>
> Regards,
>
> D.C. Cox
>
>
>
>
>
>
> On Mon, Sep 15, 2008 at 4:32 PM, <futuret@xxxxxxx> wrote:
>
> > Hi Dr. R,
> >
> > My coupling was rather low on that coil at around 0.16 or 0.18
> > I think.  I did some work at k = 0.35 but it was probably actually
> > k = 0.30 or so.  At that point a giant flashover occured and
> > destroyed the primary and seconday.  Cameron Prince uses
> > the raised grid coil.  He's applying so much peak power to the system,
> > that he can only run it in staccato I believe.  The extra high
> > voltage he's using may be changing things in some way, I don't
> > know.  I'm not really sure what's happening in his coil to
> > explain the high grid coil.  I've never heard of anyone
> > else using such a high position for the grid coil.  OT: Nice
> > stock market action lately !
> >
> > Cheers,
> > John
> > ----------
> >
> >
> > -----Original Message-----
> > From: DC Cox <resonance@xxxxxxxxxxxx>
> > To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> > Sent: Mon, 15 Sep 2008 6:04 pm
> > Subject: Re: [TCML] VTTC Coupling
> >
> >
> >
> > John:
> >
> > What coupling k value have you measured on your 833 coil?  I would guess
> > around 0.2 ???
> >
> > What is possible before destruction begins?
> >
> > I've read one person has his grid feedback coil nearly 40% up the height
> of
> > the sec coil.  And he's getting very good outputs.
> >
> > Dr. Resonance
> >
> >
> >
> >
> > On Mon, Sep 15, 2008 at 3:34 PM, <futuret@xxxxxxx> wrote:
> >
> > I don't think it would work well.
> >>
> >> John
> >> -------
> >>
> >>
> >> -----Original Message-----
> >> From: Phillip Slawinski <pslawinski@xxxxxxxxx>
> >> To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> >> Sent: Mon, 15 Sep 2008 3:50 pm
> >> Subject: [TCML] VTTC Coupling
> >>
> >>
> >>
> >> Is it possible to over couple a VTTC?  I have a 3.5" secondary, and I
> >>
> > have
> >
> >> a
> >> 4.5" form that I could use for  my primary.  If I used the 4.5" form
> >>
> > would
> >
> >> this be taking things a little too far?  Would there be any real
> >>
> > benefit to
> >
> >> doing this?
> >> _______________________________________________
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> >>
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> >>
> >> _______________________________________________
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> >
> > _______________________________________________
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> >
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