Re: Performance Question

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

Original poster: "EMMETT SECREST" <secrest2032-at-msn-dot-com> 

Dr. R...thanks for the advice about the new secondary. I will follow your 
suggestions and proceed forward. I was dying to wind that bigger secondary 
anyway and now you have provided the incentive I needed.

Emmett


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: Performance Question
>Date: Thu, 02 Sep 2004 07:55:49 -0600
>
>Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com>
>
>
>No apologies necessary.  We were all newbies at one time or another.
>
>Yes, there will be a gain.
>
>Voltage is created by V = -L dI/dt  (inductance x rate change of current).
>
>The main part of this equation, inductance (L), for a sec coil is:
>
>r^2 * n^2 / (9a + 10b)
>
>In the number part, you want to keep r (coil radius) as large as practical,
>and, within reason, n (number of turns) as large as practical.  There are
>some offsets to the value of n but for many coils 1,400 turns is almost
>always a good number to use.
>
>If you wind a new coil, keep the 4.5 to 1 height to dia ratio.  With a given
>coil dia. then this fixes the winding length.  Divide this winding length by
>1,400 and now you have the outside dia. of the guage wire to use.  Select
>the wire OD value from a wire chart and use 200 degree C wire for excellent
>high freq insulation value.
>
>If possible, select a toroid size of 2 to 2.5 times the dia. of your sec.
>coil.  Up to 4.0 is used for extreme cases.  This requires more primary cap
>and more power but provides nice outputs.
>
>This will give you spectacular performance from your new coil.
>
>
>Dr. Resonance
>
>Resonance Research Corporation
>E11870 Shadylane Rd.
>Baraboo   WI   53913
>
> >
> > Apologies to the list for the newbie type question. Without going into all
> > the specifics I have a static gap TC with a 4.5" secondary (5:1 ratio)
> > 1.440 Kva. I am considering replacing my secondary with a 10" 3:1 ratio
> > secondary. Per my calculations this would not make any viable change in
>the
> > output power (i.e. Spark length) ...am I correct or would there be
>anything
> > to gain other than the fun of winding a new secondary?
> >
> > Thanks in advance for your advice,
> >
> > Emmett
> >
> >
> >
> >
>