Re: 1600 turns

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

Original poster: "Tom Stathes by way of Terry Fritz <twftesla-at-qwest-dot-net>" <newphreak_16-at-yahoo-dot-com>


Hello
You should probably look for a 4-5kv transformer
regardless of the current you need. The low 4-5kv 
tesla coils work best with more turns on the
secondary. The larger capacitor value needed makes the
primary frequency lower, and you need a larger
inducance on the secondary to match this frequency. 

--Tom  


--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "Dave Larkin by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <teslaman15-at-hotmail-dot-com>
> 
> Hi Godfrey
> 
> Jeez...  I thought we'd left this 'magic turns
> count' thing behind along 
> with glass capacitors and carboard coilforms!  Turns
> count should not be a 
> primary design parameter.  Resonant frequency (as
> low as possible) and Zout 
> (~ 40k is about right for a coil of this scale)
> should be the primary design 
> considerations, although imho the size of former and
> guage of wire you 
> happen to have on hand are every bit as valid!
> 
> Traditionally one advantage of a higher turn count,
> higher inductance, 
> secondary is that is forces one to use a primary
> with more turns, hence a 
> higher primary Zsurge and reduced gap losses.  This
> can also be achieved by 
> using a higher input voltage, but for reaons of
> practicallity most people 
> operate below 15kV.  John Freau has been a leading
> exponent of the 'high 
> turns count' school of design -
> 
> http://hometown.aol-dot-com/futuret/page3.html
> 
> -Dave-
> 
> >From: "Tesla list" <tesla-at-pupman-dot-com>
> >To: tesla-at-pupman-dot-com
> >Subject: 1600 turns
> >Date: Wed, 29 May 2002 23:13:18 -0600
> >
> >Original poster: "Loudner, Godfrey by way of Terry
> Fritz 
> ><twftesla-at-qwest-dot-net>" <gloudner-at-SINTE.EDU>
> >
> >I removed a tube from a machine that makes
> distilled water. The tube specs
> >are 24" long, 4 & 15/16" outside diameter, 1/8"
> thick wall, open at each
> >end, and made of white, translucent plastic. I'm
> thinking about making a
> >1600 turn tesla coil secondary using #28 magnet
> wire. The flat primary will
> >be made with 1/4" soft copper refrigeration tubing.
> Can someone tell me 
> >what
> >are the advantages of the 1600 turn thing over the
> classic 1000 turns? With
> >a 10 LB spool of #28 wire and the tube on hand, I
> might as well go ahead.
> >What is the maximum kVA transformer I should use in
> the power supply?
> >
> >Godfrey Loudner
> >
> >
> >
> 
>