Re: NST TEST GRAPHS (was NST power test)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>

Hi Sean,

See the paper at:

http://hot-streamer-dot-com/TeslaCoils/MyPapers/modact/modact.html

Cheers,

         Terry

At 11:36 AM 1/30/2003 -0600, you wrote:
>I think someone already mentioned this, but there is going to be a huge
>difference between the steady state analysis of just an RC load on an NST
>and the transient that occurs when a spark gap fires in a tank circuit for
>an NST with a capacitive load.  There is also a difference between where the
>capacitor is in the circuit and where the gap is.  With the gap across the
>NST, during gap conduction a current flows in the through the current
>limiting inductance of the NST, and stores up energy, upon the quenching of
>the spark gap, this energy is then dumped into the tank cap, and the gap can
>fire sooner than just the time that S.C. current that the NST would provide.
>If understanding how an NST reacts to a TC circuit is what is trying to be
>accomplished, then some time domain analysis needs to be done.  Terry, I
>believe you have closely monitored the secondary current of an NST while a
>coil was running.  A scope plot of tank cap voltage and NST secondary
>current would be interesting for a 120 bps case, with a controlled gap such
>as a TSG firing at the peak of the tank cap voltage.  Has this already been
>done?  Perhaps also the voltage and current from an NST simply being shorted
>by a TSG without a tank circuit hooked up would be useful.  The gap would
>have to be quenched rather quickly, but it would show what happens to the
>voltage from the secondary of the NST directly after gap quenching, or
>rather what it would "like" to do, since in a TC tank circuit it is loaded
>down by the tank cap.  A lot of this could be done in SPICE, but maybe some
>real testing would be more fun :-)  Not to mention that all the parameters
>for simulating an NST are not all the same, and several NSTs could be tested
>this way rather easily.
>
>Sean Taylor