Re: John Freau design trick making a primary

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

Original poster: "Steven Ward by way of Terry Fritz <twftesla-at-qwest-dot-net>" <srward16-at-hotmail-dot-com>

Well,

Basically, you make your secondary have more turns than usual (like 1500 or 
more) and than you use smaller wire(with smaller spacing) on the primary in 
order to get enough inductance, to reach tuning, in a smaller space(1/4" 
tubing cant do this with small coils).  This reduces the heat produced by 
the spark gap in that it cannot discharge as much current into the 
primary(higher inductance now). Reduced heat= reduced losses.  I should not 
really be the one telling you this since im definitely not an expert. 
Basically just writing to support the idea and that it does work.  Look on 
the net for his website, but im sure he will write about this and tell you.  
I decided to give it a shot, and it worked great!

Steve Ward.


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: John Freau design trick making a primary Date: Fri, 26 Jul 
>2002 08:25:29 -0600
>
>Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tb3-at-att-dot-net>
>
>Soooo,
>
>What's this John Freau design trick making a primary
>with 10awg but more turns?
>
>Terry Blake
> > Original poster: "Steven Ward by way of Terry Fritz 
><twftesla-at-qwest-dot-net>"
> > <srward16-at-hotmail-dot-com>
> >
> > Hi Dan,
> >
> > In my experience with a 450w coil awhile ago, going from 12awg to 13
> > conductor litz was a very noticable difference!!  I got an additional 
>~15%
> > more spark lenght from this little coil.  Now im working on a coil with 
>2X
> > your PSU(15/120), and im definitely NOT using anything as wimpy as 
>14awg,
> > really 6awg is pretty good but litz may be even better if its large 
>enough.
> > Just to further my point, i have noticed that anything less than what 
>the
> > rest of the coil is wired with gets warm!  For example: while 
>experimenting
> > with off axis inductors, the small 14awg wire i used for the inductor 
>got
> > HOT from a small 550watt coil!!  The rest of the coil was litz and 
>copper
> > tubing and the 14awg was junk compared to another inductor made from 1/4
> > copper.  Also, i tried out a John Freau design trick with making a 
>primary
> > with 10awg but more turns.  The entire primary coil got warm after about 
>2-3
> > minutes of running, but I will say that this primary was great!!  It 
>really
> > squeezed a lot out of the small coil, about 30" from a 12/40(modified) 
>and a
> > static gap only!  So over all i do not think that you should use that 
>14awg.
> >   Go for the 6awg, it looks like you already did quite a bit of work so
> > whats some extra connection changes, go for it!
> >
> > Steve Ward.
> >
> >
> > >From: "Tesla list" <tesla-at-pupman-dot-com>
> > >To: tesla-at-pupman-dot-com
> > >Subject: Wire for Tesla Coil Tank Circuit
> > >Date: Wed, 24 Jul 2002 11:38:26 -0600
> > >
> > >Original poster: "Mccauley, Daniel H by way of Terry Fritz
> > ><twftesla-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>
> > >
> > >
> > >
> > >I'm in the process of choosing my wire for use in hooking up components 
>in
> > >my primary tank circuit.
> > >
> > >For a small coil (15kv/60ma) my current choices are:
> > >
> > >1.  60kV, 14AWG High Voltage wire
> > >
> > >2.  6 AWG Welding Cable
> > >
> > >I'd rather use the 60kV, 14AWG High Voltage wire as most of my 
>components
> > >already have the proper terminals
> > >to use for this, as the 6 AWG requires much larger terminals which i 
>would
> > >need to refit.
> > >
> > >However, I realize the low-inductance 6 AWG may better fit the bill.  
>But,
> > >if both wires will do the job adequately in the small coil like mine, 
>i'll
> > >go with the high voltage wire.
> > >
> > >What are your thoughts???
> > >
> > >Thanks
> > >
> > >Dan
> > >