Re: [TCML] VTTC Coupling

[futuret@xxxxxxx]

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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