RE: [TCML] BPS Testing

["Lau, Gary" <Gary.Lau@xxxxxx>]

Hi Bart,

I missed the basic test configuration that you're using.  Two 15/30's, but what size cap?  Gap geometry?  Did the coil perform well?  82 or 70 BPS seems low for a well performing coil.

Regards, Gary

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of bartb
> Sent: Sunday, March 09, 2008 9:11 PM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] BPS Testing
>
> Hi All,
>
> I continued BPS testing today. I paralleled two 15/30's after phasing
> for 15/60 power. I didn't want to change any coil parameters other than
> power and a single 15/30 would have been just too small for the cap
> size. I removed the safety gap and used 120Vac input via switch to keep
> as many variables out of it as possible (no variac, etc.).
>
> I did have some problems with the pc loosing the usb hardware device. It
> captures data up to the point where the usb hardware device gets lost.
> I'm aware of this problem (as is the manufacturer). I recorded 4.5
> seconds of run time (actually a little more but Excel maxes out at 65000
> rows of data). I probably should have turned down the sample rate. Hind
> site.
>
> Here's a gif image of 15/60 run. Dead time on left of image is the time
> it took me to run in the garage and turn on the coil.
> http://www.classictesla.com/temp/bps_compress.gif
>
> When I save the csv file, I set the marker just before the first break
> (so data to left is not exported). Here is a picture of the break area
> expaned with no compression.
> http://www.classictesla.com/temp/bps_test_1560.gif
>
> The Excel file identifying time stamps and break voltages:
> http://www.classictesla.com/temp/gap15-60-NST-3.xls
>
> The raw csv file:
> http://www.classictesla.com/temp/gap15-60-NST-3.CSV
>
>
> Ok, Javatc calculated 70 bps for this NST, cap size, gap, etc..
>
> What I measured were 373 breaks over a time span of 4.542 seconds. So 82
> bps.
>
> Seems about right to me. I don't see a large variation in calculation to
> measurement.
>
> Take care,
> Bart

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