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Re: New Coil

Original poster: "Mike" <mike.marcum@xxxxxxxxxxxx>

wonder what kind of gap ALF is gonna be using? I can't picture scaling up a rotating disc and also speeding it up indefinitely without it flying apart at some point, even if it's G-10 or 11. May multiple smaller discs spinning counter-clockwise to each other? Or maybe run at higher than the usual 14.4 kV to reduce current to sane levels?

----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Tuesday, April 26, 2005 8:51 PM
Subject: Re: New Coil

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
> 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