Re: Attaching Tungsten Electrodes to Rotor etc...

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

Original poster: "tesla by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla-at-paradise-dot-net.nz>

An alternative view
The ease of construction is what matters here. A ring of copper  will be
better than Aluminium BUT the placing of say effectively Two parallel strips
of good conductor (each way around the ring) 1"wide by say 12" total length
into the primary path will have very little impact on overall losses.
Copper has a resistivity of 1.6uohn/cm^3 and Aluminium 2.66uohm/cm^3. Given
that the fact that most losses will occur in the primary coil the spark gap
itself and ESR of the caps I assert again that the point of a ring or no
ring is completely  moot.
Best
Ted L in NZ
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, July 20, 2002 10:30 AM
Subject: Re: Attaching Tungsten Electrodes to Rotor etc...


> Original poster: "D.C. Cox by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<DR.RESONANCE-at-next-wave-dot-net>
>
>
> Don't use a conductive aluminum ring on the outside of the rotor.
>
> Just cut the TIG electrodes to a total length each of 1 inch and fix them
> axially through the outer 1/2 inch edge of the rotor disk.  Have a machine
> shop do this with a precision reamer.
>
> In any Tesla oscillator primary circuit the old law "current in a series
> circuit is the same at any point" holds true.  Why bother using 4 AWG
> welding cable (copper) for hooking up all the essential components and
then
> totally spoil the Q factor with some aluminum in series with this nice low
> resistance copper?  Keep it all low loss.
>
> Dr. Resonance
>
>
>
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Friday, July 19, 2002 10:56 AM
> Subject: Attaching Tungsten Electrodes to Rotor etc...
>
>
> > Original poster: "Mccauley, Daniel H by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>
> >
> >
> >
> > I'm building a SRSG using one of D.C. Cox's synch motors.
> >
> > Just had a few questions:
> >
> > I'm going to be using a 7" dia., 1/4" thick LE Gastrolite (Phenolic)
> > disc for the rotor.
> > My questions are as following:
> >
> > 1.  For the aluminum conductive ring on the outside of the rotor,
> > what thickness works best, what aluminum alloy works best, and whats the
> > best way to attach this to the rotor.
> >
> > 2.  I've chosen to use 1/8" thick thoriated tungsten rods which are
> > available at McMaster-Carr.  The only thing, is what is the best way to
> > attach these to the rotor and to the other stationary electrode support.
> I
> > know that tungsten is a b**** to machine - should i attempt to use a die
> to
> > thread these rods and attach via nuts????
> >
> > Any help appreciated.
> >
> > I realize i've been asking a lot of questions so far, and I want to
> > thank all of you for all your help!!!!!!!
> > Much appreciated!!!!
> >
> > Dan M.
> >
> >
> >
> >
>
>
>
>