RE: [TCML] how much does secondary diameter affect efficiency?

[James Hutton <b-u-r-t-o-n-boy@xxxxxxxxxxx>]

does 26g sound good?

> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] how much does secondary diameter affect efficiency?
> From: futuret@xxxxxxx
> Date: Wed, 29 Feb 2012 16:04:45 -0500
> 
> James,
> 
> If you use the 4" form, you may want to use wire that's a little thinner
> than usual to keep the inductance high.  Also the form should be a little
> taller than a typical 4" form.  In other words make the form almost as tall as
> you would use for a 6" form.  You may probably want to use two toroids
> also; a larger one above a smaller one.  This will keep the sparks farther
> away from primary and ground.  By doing these things, you'll keep the
> efficiency reasonably high.  In truth, this is the way to build a coil that's
> compact, yet reasonably efficient.  The primary will tend to be smaller
> in diameter too which will make the coil more compact.  But the toroid
> must be large to get the full spark length capability.  
> 
> Your spark gap break rate will be a factor too.  Higher break rates are
> less efficient but have smaller bang sizes and should stress the secondary
> less.  
> 
> As you can see, there are many factors to consider overall. 
> 
> Cheers,
> John
> 
> 
> 
> > James,>       Coil diameter has little to do with efficiency, and too large of a> secondary will make your coil look unimpressive...  Go with the 4 inch,> and don't look back...  I use 4.5 inch for about 3 kW with no problems> at all...>> Scott Bogard.>> On 2/28/2012 4:48 PM, James Hutton wrote:>> Hello, I'm about to begin building a 15kv 120ma coil.I read somewhere>> that with powers over 1.5kw, you should be using atleast 6inch PVC.I>> have lot's of spare 4inch PVC, but I can't seem to find any 6inch at any>> local hardware stores. (except for 10ft long 6inch sewage pipes for>> $70)So I'm just wondering if it is absolutely necessary to go bigger>> than 4 inch when using 1.8kw, and how much it would affect the>> efficiency of the coil if I use 4 inch instead of 6.(also, If I do use 4>> inch, how long should my windings be?)>> thanks!>>>> -James Hutton 		 	   		  _______________________________________________>> Tesla mailing list>> Tesla@xxxxxxxxxx>> http://www.pupman.com/mailman/listinfo/tesla>>> _______________________________________________> Tesla mailing list> Tesla@xxxxxxxxxx> http://www.pupman.com/mailman/listinfo/tesla>>_______________________________________________Tesla mailing listTesla@xxxxxxxxxxxxxx://www.pupman.com/mailman/listinfo/tesla
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