Re: New Coil

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>



Don't allow it to happen!

If you are running a protective circuit you will not get resonant rise at
the pole xmfr.  Most experimenters abuse the heck out of them, but use
varisters, safety spark gap, and a bunch of 750 Ohm, 200 Watt resistors
connected in parallel to give around 40-50 Ohms in series with the output.

Dr. Resonance


>
> Dr. R,
>
> In your opinion, what should be the maximum secondary voltage (with
> resonant rise) one should operate a 14.4KV pig with 240Vac on the input.
>
> Gerry R
>
> >Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>
> >
> >
> >
> >Another problem begins to occur around 0.3 uF.  We were literally melting
> >1/2 inch dia. tungsten electrodes bonded to copper.  We had to go to a 30
> >inch dia. rotor for Big Bruiser with 1 inch dia. tungsten electrodes.
> >Higher rotational speed plus larger electrodes are carrying the 5,000 Amp
> >plus currents.  This coil was running off a 14.4 kV pole xmfr operating
at
> >26.4 kVA.
> >
> >These big coils tend to get expensive --- fast!!!
> >
> >Dr. Resonance
> >
> >
> > >
> > > In a message dated 4/24/05 3:27:23 PM Pacific Daylight Time,
> > > tesla@xxxxxxxxxx writes:
> > > I plan on using my welder for current control and
> > > either my two 1256's or my three 540 volt 30 amp
> > > voltpac stack. I currently use my maxwells three deep,
> > > but may only use them two deep for 75 nF 70 kV rating,
> > > which is kinda small for a coil this size. I'm afraid
> > > to use them as 300 nF 35 kV, as this seems to be too
> > > close to the edge. I have no idea how rough a life
> > > these guys had before I got them.
> > >
> > > Adam
> > >
> > > Adam,
> > >
> > > I have a couple of those Maxwell caps also, and as you, have been
> >concerned
> > > about using only one and have always used the two in series. I have
read
> > > where lots of folks on this list have the same caps.  Is anyone only >
> > using
> > > them individually, or multiple in parallel?  If so, with what power
> > > supply?  I would feel ok at say 10 kv but both of my coils use a 15 kv
> > > supply and I have just been chicken to find out what kind of voltage >
they
> > > can really take.
> > >
> > > Ed Sonderman
> > >
> > >
> > >
> >
> >
>
>
>
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