RE: [TCML] NST Measurements

[Jeremy <jeremy_runescape@xxxxxxxxxxx>]

ok, today i went and bought myself a cheap multi-meter amongst other stuff like switches, diodes, rectifiers, etc. My mains supply was measured to be 233VDC, and when wired to the secondary of the NST gave a primary reading that seemed to vary almost sinusoidally between 2.5V and 2.9V. That's a range of between 18.7kV and 21.7kV with 20.1kV as the mean output voltage. I didn't even know they manufactured NSTs of such specs, I thought 15kV was the max they manufactured. anyway, the problem at hand is how to determine the power of the NST either in watts or mA output. My multi-meter only measures amperage in DC, so i would have to rectify the output/input, and there again i don't know how that would mess with the values.
 
Any advice would be much appreciated,
 
thanks and regards,
jeremy> Date: Sun, 18 Jan 2009 14:37:26 -0800> From: bartb@xxxxxxxxxxxxxxxx> To: tesla@xxxxxxxxxx> Subject: Re: [TCML] NST Measurements> CC: > > Hi Jeremy,> > How you perform a measurement depends largely on the equipment you have> on hand and what it is you want to identify. So my first question is> what meters do you have hand to make measurements? Obviously, a HVac> probe would be ideal, but not absolutely necessary to simply identify> rough specs. If you have say only a digital rms meter handy, hook up> 120Vac to the output side and measure voltage on the primary. This will> do fine for identifying your turns ratio (Vout/Vin). Then you can just> figure wall plug AC volts x turns ratio for the output. Current more> complicated.> > If you want to look at "more" and get to know the transformer for what> it really is, two meters are helpful. One to read current and the other> to read voltage along with a HV probe. I'm not a big fan of reverse> wiring the transformer to gain transformer characteristics other than> the basic turns ratio. When normal current is flowing, it will be> different from the reverse wired situation because the secondary voltage> applied is never the output volts (but some far lower voltage). If you> could, a hv probe would be needed. But at that point, you may as well> feed low voltage high current to the primary for ease of measurements.> > So again, what equipment do you have on hand?> > Bart> > Jeremy wrote:> > Ok, wait, so how exactly do you guys propose measuring NST outputs for dummies? i have 9kV 30mA unit as well as a large unlabelled unit atm, and the unlabelled one arcs at over half an inch so i'm guessing it's at least 15kV 60mA. I need the measurement on the unlabelled unit. I was thinking of using a 10V input to the NST, then further stepping down the output by 20x to be measured by a voltmeter. Is this workable? (all components rated at 240V input)> >> > > _______________________________________________> Tesla mailing list> Tesla@xxxxxxxxxxxxxx> http://www.pupman.com/mailman/listinfo/tesla
_________________________________________________________________
What can you do with the new Windows Live? Find out
http://www.microsoft.com/windows/windowslive/default.aspx
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla