Re: Attaching Tungsten Electrodes to Rotor etc...

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

Original poster: "D.C. Cox by way of Terry Fritz <twftesla-at-qwest-dot-net>" <DR.RESONANCE-at-next-wave-dot-net>


Dan:

Use the 4 AWG welding wire for better resonant current handling connections.
Keep the leads short and air is the insulation.  If you need to go tight
past a grounded part slip a piece of tygon tubing over the welding cable.
It's easy to just use air if you keep the layout right so that the
connections are short and are not near a ground source by 1.5" or more ---
which they should be anyway for RF oscillator currents.  Forget the 60 kV
wire --- it's not necessary.

Again, the rotor has the electrodes pressed in at a 90 degree angle
(axially) to the surface of the rotor.

Something like this:


                                        e                              e
                                        e                              e
                                        e                              e
                                  RRRRRRRRRRRRRRRRRRR
                                        e                              e
                                        e                              e
                                        e                              e


where e = rotorary electrode  and R is the phenolic rotor disk material.

Then you use a simple pair of fixed stationary sparkgaps to finish out the
system.

Best regards,

Dr. Resonance






----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, July 20, 2002 11:45 AM
Subject: Re: Attaching Tungsten Electrodes to Rotor etc...


> Original poster: "Daniel McCauley by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <dhmccauley-at-spacecatlighting-dot-com>
>
>
> How is the electrical connection made in this configuration without the
use
> of an aluminum ring?
>
> Should I be using 4 AWG to connect all my components???  I was planning on
> using 12 AWG 60kV high voltage wire.
>
> Thanks again.
> Dan
>
>
>
> > 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.
> > >
> > >
> > >
> > >
> >
> >
> >
> >
> >
>
>
>
>