Re: whats my coupling? (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Fri, 17 Aug 2007 17:09:20 -0400
From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: whats my coupling? (fwd)

Thanks Doc.
     I would love to go to TeslaFest, but I'll be stuck in School here in PA 
(is a degree really that important?).  Thanks.
Scott Bogard.


>From: "Tesla list" <tesla@xxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: Re: whats my coupling? (fwd)
>Date: Fri, 17 Aug 2007 06:27:39 -0600 (MDT)
>
>
>---------- Forwarded message ----------
>Date: Thu, 16 Aug 2007 23:28:54 -0500
>From: resonance <resonance@xxxxxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: Re: whats my coupling? (fwd)
>
>
>
>Coeff. of coupling is dependent only on the geometry of the two coils not 
>on
>the power levels, break speed, or capacitance value.
>
>You can measure coeff. of coupling with the "resistor" method listed in the
>archives --- very accurate, or haul your coil to our TeslaFest in Sept. and
>we will measure it for you using the resistor method.  I will also be doing
>a short 30 minute "training session" on JAVATC at the TeslaFest.
>
>Also, JAVATC will give you near exact coeff. of coupling for your setup.
>
>For a 6 inch dia. coil optimum coeff. of coupling would be in the range of
>0.12 to 0.14.  Racing sparks start at 0.18 or above.  With an inverted cone
>and 6 inch dia. sec coil you are, at present, overcoupled.  Spark output
>with increase if you go to a flat horizontal coil and set your k = 0.12 to
>0.14.  You can use a sig. gen and oscope to check the freq. side band
>separation.  Ideally, you want the side bands to disappear.
>
>With a 6 inch coil I suspect you will find best output with your sec. coil
>elevated approx 2.5 to 3.25 inches above the horizontal plane of your flat
>primary.
>
>
>Dr. Resonance
>
>Resonance Research Corp.
>www.resonanceresearch.com
>
>
>----- Original Message -----
>From: "Tesla list" <tesla@xxxxxxxxxx>
>To: <tesla@xxxxxxxxxx>
>Sent: Thursday, August 16, 2007 8:48 PM
>Subject: whats my coupling? (fwd)
>
>
> >
> > ---------- Forwarded message ----------
> > Date: Thu, 16 Aug 2007 20:56:07 -0400
> > From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
> > To: tesla@xxxxxxxxxx
> > Subject: whats my coupling?
> >
> > Hey guys.
> >     For those of you who are fluent with the various design programs, I
> > need to know where my optimum coupling is.  I have a 6-in PVC secondary,
> > 31
> > inches wound, 22 AWG.  My top load (is this important?) is 2 toroids, 
>the
> > bottom is 7*24, the top is 12*36, one sits atop the other, and the 
>bottom
> > one is about 2.5-3 inches from the top winding.  My primary, is 1/4 in 
>cu
> > tubing, inverse cone (about 20 degrees) with an 8 in hole in the center,
> > .75-in between turns (tapped at turn, um, I cannot remember, but I think
> > it
> > is 7-8-ish).  My power supply is 4 MOTs, 8kV and estimated 225mA, tank
> > capacitance is 81nf (again, I'm not sure if you need this information).
> > My
> > secondary is stationary, but I can raise and lower my primary from 
>.25-in
> > below the bottom winding, to about a foot, I am working on a way to 
>adjust
> > my top load height.  Thanks.
> > Scott Bogard.
>
>
>
>

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