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Re: Passive Ballasting for DRSSTC - My thoughts before Ed Wingates Teslathon



Original poster: Edward Wingate <ewing7@xxxxxxxxxxxxxxxx>

Tesla list wrote:

Hi Steve,

Speaking for myself, you assume correctly.

I used a Pearson model 410 wide band current transformer and 3" grounded copper sphere. I would also be curious to see what your coil measures.

Ed

Original poster: Steve Ward <steve.ward@xxxxxxxxx>

I assume both of you (Ed and Dan) are measuring peak current with a CT on some sort of grounded target? I can easily perform this test some time, though the accuracy of any number i arrive at will probably only be good to maybe 10% as i dont have an oscilloscope that displays the exact value of the peak (i just have to judge it by eye). Or maybe i can borrow my friends DSO.

Dan, did you measure any difference in arc current with say a 2 foot arc and a 4 foot arc? I would imagine the shorter arcs might have more current through them (Assuming you have the coil running full power in each case), but this is dependent on what the actual impedance of the ionized channel is. I suppose i can test this myself if you havent already. Actually... im wondering why i havent performed this test yet.

Steve

On 9/1/05, Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx> wrote:
Original poster: "Mccauley, Daniel H" <<mailto:daniel.h.mccauley@xxxxxxxx>daniel.h.mccauley@xxxxxxxx>



Thanks. Measured peak arc current of my DRSSTC II system is 3.6A peak. I'd be curious to see what Steve's coil did.

Dan



Dan,

I measured a peak arc current of 15 amps. I have no idea if Steve has
ever measured the arc current of his coil.

Measured arc length is 14 feet and building limited.

Ed