Re: New secondary, John Freau efficiency theory...etc.

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

Original poster: "K. C. Herrick by way of Terry Fritz <twftesla-at-qwest-dot-net>" <kchdlh-at-juno-dot-com>

Apropos this discussion, which I have not been completely following, I'm
afraid, this may be of interest:  I have two secondarys for my s.s.
system--the first, 12" diameter x 51" high and the other, 12" diameter x
35" high.  They are made essentially identically, with just 1 size of
wire-diameter difference, as I recall, and both of them space-wound to
about the same degree.  The smaller resonates at about 140 KHz and the
other, about 100 KHz.

I've not used the larger coil for a very long time and so can't say, now,
how well it works with the essentially-finished system.  But if a) I can
be reasonably confident I have overcome a recent rash of primary-troubles
and b) I can bring that coil's toroid-mounting configuration up-to-date
in time, I'll bring both coils along to the No. CA Teslathon.  I will be
able to pop one or the other in place in a trice and so make for an
instant comparison of their relative performance, with tuning optimal and
all other factors being the same.
 
I'll look forward to doing that since, here at home, I enjoy very little
"head room" for the sparks without going to a whole lot of trouble.

Ken Herrick

On Thu, 27 Jun 2002 16:30:53 -0600 "Tesla list" <tesla-at-pupman-dot-com>
writes:
> Original poster: "John H. Couture by way of Terry Fritz 
> <twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
> 
> 
> I, for one, do not believe that John Freau's efficiency theory goes 
> against
> established efficiency theory. His efficiency theory is a collection 
> of
> construction details obtained from actual coil testing that has 
> proven to
> work. His tests have shown that certain TC details work better than 
> others.
> In other words his methods show how to build a TC which results in 
> less
> losses. Less losses mean higher efficiency and more output.
> 
> Congratulations John, for putting efficiency into a form that 
> coilers can
> actually incorporate into their coil building. This is certainly 
> much easier
> for a coiler to follow compared to trying to apply some 
> incomprehensible
> jargon that coilers cannot agree upon.
> 
> John Couture
> 
> --------------------------------
> 
> 
> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Thursday, June 27, 2002 11:40 AM
> To: tesla-at-pupman-dot-com
> Subject: New secondary, John Freau efficiency theory
> 
> 
> Original poster: "Mr Gregory Peters by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <s371034-at-student.uq.edu.au>
> 
> All,
> 
> As afore mentioned, my old 12" secondary just destroyed itself. I 
> now
> think that this may have been partly caused by very poor tuning as 
> the
> coil has survived several other runs with no breakdown, all other 
> things
> being equal except tuning (I retune every time I use the coil). 
> Anyway,
> I need to make a new ~12" (315mm) secondary. I have been reading 
> John's
> efficiency theory, particularly regarding secondary construction. 
> While
> it goes against everything I have been led to believe over the last
> seven years, the ideas do seem feasible, and seing as though my 
> last
> secondary just died, it has given me motivation to try something
> rent. My old secondary was 315mm wide, with a 950mm long winding of
> 0.95mm wire for 1000 close wound turns. For the new secondary I 
> propose:
> 
> Diameter: 315mm
> Winding length: 1400mmm (4.4:1 aspect ratio)
> Wire diameter: 1mm (1400 turns)
> 
> I thought I would run this by the list to see what you all think. I 
> am
> open to suggestions. I would particularly like John's input on this 
> matter.
> 
> Cheers,
> 
> Greg Peters
> Department of Earth Sciences,
> University of Queensland, Australia
> Phone: 0402 841 677
> http://www.geocities-dot-com/gregjpeters
> 
> 
> 
> 
> 
> 
> 
> 
>