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
>
>
>