RE: [TCML] Toroid height, What's best

["Lau, Gary" <Gary.Lau@xxxxxx>]

Based on experiments I performed with proximity-to-primary eddy current losses, I neglected proximity-to-secondary losses, and this was a mistake.  But - it sounded like you were suggesting that such losses could be compensated for, and I don't see how.  

Regards, Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Dex Dexter
> Sent: Thursday, February 25, 2010 6:17 AM
> To: Tesla Coil Mailing List
> Subject: RE: [TCML] Toroid height, What's best
> 
> Compensation,if needed, for some change of
> effective secondary circuit inductance.
> Losses induced by proximity of the toroid to top
> of secondary are negligible.
> I read somewhere Q change based study,
> with measurements,where they concluded that
> these losses with various sizes of aluminium
> toroids put just above top turn of secondary
> where less than 3% of total input power.
> If I rememeber correctly the losses became serious
> only with steel objects used for topload,or with
> frequencies well in Mhz range.
> 
> What the losses induced by proximity of the toroid
> to the primary have to do with this?
> I think not many build tesla coils with top toroid
> just couple of inches above primary coil.
> Maybe in some cases of mini Tesla coil :-)
> 
> 
> Dex
> 
> --- Gary.Lau@xxxxxx wrote:
> 
> From: "Lau, Gary" <Gary.Lau@xxxxxx>
> To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> Subject: RE: [TCML] Toroid height, What's best
> Date: Thu, 25 Feb 2010 00:12:24 +0000
> 
> A shorted turn is a loss, and there's no way to compensate for that.
> 
> However, the losses induced by proximity of the toroid to the primary are negligible,
> unless it's within just a couple of inches.
> 
> Gary Lau
> MA, USA
> 
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> > Behalf Of Dex Dexter
> > Sent: Wednesday, February 24, 2010 2:37 PM
> > To: Tesla Coil Mailing List
> > Subject: RE: [TCML] Toroid height, What's best
> >
> >
> > So what?
> > You can compensate for shorted turn effect.
> >
> > Dex
> 
> 
> _____________________________________________________________
> Washington DC's Largest FREE Email service. ---> http://www.DCemail.com ---> A
> Washington Online Community Member --->
> http://www.DCpages.com
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla