RE: [TCML] NST Measurements

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

No - Backfeeding the NST to determine the turns ratio DOES NOT WORK.  That's what this thread is about.

Regards, Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Jim Mora
> Sent: Wednesday, January 21, 2009 11:52 PM
> To: 'Tesla Coil Mailing List'
> Subject: RE: [TCML] NST Measurements
> 
> You could try backfeeding the NST. Apply 240 ON THE HIGH Voltage horns.
> 15000/240= 62.5 turns ratio so with 240 in the HV horns, the line voltage
> should be 240/62.5 = 3.84 volts. A "kill a watt" (don't know if there is a
> 240/50 version) is a great item. You could set up a Jacobs ladder plug in
> the transformer to the "Kill a Watt" and measure the wattage. Otherwise, you
> will need to be able to measure 15000*.06MA=900watts or 900/240=3.75 amps at
> the line plug.
> Jim Mora
> 
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf
> Of Jeremy
> Sent: Sunday, January 18, 2009 10:18 AM
> To: TCML
> Subject: RE: [TCML] NST Measurements
> 
> 
> 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)
> 
> jeremy
> Singapore> Date: Sat, 17 Jan 2009 07:44:46 -0800> From: evp@xxxxxxxxxxx> To:
> tesla@xxxxxxxxxx> Subject: Re: [TCML] NST Measurements> CC: > > Yes,
> better
> said Ed.> > Sorry to hear about the scale biting the dust on a nice Simpson.
> Was > this unloaded just playing around with the transformer with a cap
> across > the output? Probably the safe way to do that would be to load >
> resistively and scale. The simulations I was messing with showed some >
> amazingly high voltages at resonance if there's no other load. The >
> transformer would never survive (assuming nothing else died first).> >
> Bart"> > Unloaded except for capacitor. This was one of those cases where >
> right after it happened I wondered why I was doing it as the problem was >
> obvious. Live and learn!> > Ed> >
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