Re: [TCML] Stranded/silver plated wire (was Scientific Method)

[DC Cox <resonance@xxxxxxxxxxxx>]

Someone asked the question about 10 years ago, and I provided an answer.
Another person raised the question this week and I again gave this different
person --- the exact same answer.


The silveer tinned stranded wire has provided superior peak current in the
sec coil.

I've built magnet wire coils and silver-tinned stranded coils and the
stranded, silver tinned coils, always develop more current in the sec coil.
These are near identical coils, same number of turns, same wire guage, and
same coilform type (fiberglass) that I used in my testing approx 25 years
ago. I can't explain exactly why but it does produce increased sec current
and hence slightly brighter sparks.

As I recall Bill Wysock also used this type of wire and can probably also
confirm the superior performance.

Dr. Resonance




On Tue, Jul 28, 2009 at 1:33 PM, Lau, Gary <Gary.Lau@xxxxxx> wrote:

> Are you saying that you use silver-plated STRANDED wire for secondaries?
>  Granted, AC resistance and Q are far less important on the secondary side,
> but the notion of this wire being superior to common magnet wire is
> incorrect.  Stranded wire is inherently more lossy at RF frequencies.  This
> is because the skin effect causes current to travel on the outer surface of
> the bundle.  If a strand on the outside of the bundle weaves to the interior
> of the bundle, the current in that strand will try to find its way back to
> the surface, and this means traveling to adjacent conductors, through any
> resistive oxide layers between them.  This strand-hopping results in a much
> higher AC resistance than if a single conductor were used.  This is the
> reason that Litz wire insulates the strands from one another.
>
> I am NOT suggesting that stranded wire is unsuitable for use in
> secondaries, since secondary Q is not extremely important.  Clearly it works
> OK.  Just that it's incorrect to suggest that the wire you use is somehow
> superior, beyond aesthetics.  And honestly, I'm no longer even sure if you
> DID suggest that it was superior.
>
> As to your legal constraints, I would, putting on my moderator hat, insist
> that you not drop any further references and teases to things that you are
> unable to speak freely about.  You must realize that dropping such
> unverifiable claims calls into question your credibility.
>
> Regards, Gary Lau
> MA, USA
>
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> > Behalf Of DC Cox
> > Sent: Tuesday, July 28, 2009 11:42 AM
> > To: Tesla Coil Mailing List
> > Subject: Re: [TCML] Scientific Method
> >
> > Anyone attend Tesla Fest 2009 can see the 1 Hy inductors for themselves.
>  We
> > use them in our Marx generators, and will have a 600 kV unit in
> operation.
> >
> > They  can also see a few of our large coils in operation with silver
> tinned
> > wire, fine stranded.
> >
> > As for the large coil down south, I've already clearly stated my reasons
> for
> > not showing photos of it (like getting sued).  My legal contract with my
> > client protects his desire to remain annonomous, and I will respect that
> > agreement which I signed.
> >
> > Dr. Resonance
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