Re: Bipolar coil question (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 7 Aug 2007 17:41:31 +0100
From: Chris Swinson <list@xxxxxxxxxxxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Bipolar coil question (fwd)

> 
> I'm having a brain fade, and can't jog the information loose in there. 
> 
> I'm in the process of building a small bipolar coil (to replace my
> testbed that went up in smoke), and I can't remember...
> 
> Do I calculate Fres of the secondary as a whole (IE, lump both topload
> C's together and do it as one secondary), or do I calculate it as two
> separate coils, with the center point to the ends as the length of each
> coil?  
> 
> I forget, and I'm at work, so I can't simply throw my signal generator
> on it to see.  
> 
> Thanks!
> 
> Shad H. 
> 



As adding a toroid lowers Fres, there you have your answer.

Chris