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Re: SSTC vs SPTC was ( Re: NSTand PT replacement xmfrs)

Original poster: "John Couture" <johncouture-at-bellsouth-dot-net> 

Dan -

Thanks for the info regarding your Tesla coil tests. I believe you have done
a great job in advancing the design of Tesla coils especially the SSTC. You
not only have advanced the TC technology you have also the ability to build
well crafted devices.

The best way to make comparisons is to test real coils. Simulations can
account for only a few of the many variables involved. The three most
important parameters in the tests are the TC Power, TC energy, and the TC
Overall Efficiency. Note that in an AC circuit the power is normally called
the average power. The RMS power has no significance. Refer to an EE book or
Physics book. The RMS voltage and current are based on energy conditions.

Power has to do with instantaneous conditions. Because of the complex
circuitry and unique operation of Tesla coils it is difficult to properly
test  for instantaneous conditions.  The proper method of comparing Tesla
coils is to compare the overall energy efficiency of the coils.

John Couture


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, May 31, 2004 10:59 PM
Subject: Re: SSTC vs SPTC was ( Re: NSTand PT replacement xmfrs)

 > Original poster: "Eastern Voltage Research Corporation"
 > Not this power vs. energy crap again . . .  ;)
 > I'm talking about REAL Power RMS being delivered to the primary circuit.
 > basically this is a comparison of efficiencies I suppose.
 > And my comparison is one of both qualitative and quantitative
 > It is based on observations and measurements taken of
 > my ISSTC and other coils I have seen using a 14.4kV / 1.5kVA Potential
 > Transformer powered tesla coil running at about 3 to 3.5kW.
 > In all cases I have witnessed, the arc thickness and voracity is greater
 > the ISSTC with REAL Rms input power of 1.5kW vs. ALL the PT
 > powered coils I have seen (which is about five so far) running at 3 to
 > REAL Rms input power.  Also, arc length from the ISSTC almost
 > always exceeded the arc length i've seen in these PT powered coils.
 > (REAL RMS input power was measured using the appropriate equipment on both
 > my ISSTC coil and my 3.5kW PT powered spark gap coil)
 > Since the other four coils I've seen (i.e. Terry Blake's, Bill Shepards,
 > etc...) use identical ballast and similar set-ups, i assume the same
 > REAL Rms input power)
 > Dan
 >  > Dan -
 >  >
 >  > How did you determine that the solid state Tesla coil (SSTC)
 >  > the spark gap Tesla coil (SPTC) in power vs power? What tests did you
 >  >
 >  > It was my understanding that from past coiler tests that the SPTC
 >  > outperformed the SSTC in energy vs energy or overall efficiency.
 >  >
 >  > Keep in mind that power is equal to volts times amps and is an
 > instantaneous
 >  > condition. Power is equal to energy/time. With a fixed time period the
 > power
 >  > and energy would be equivalent.
 >  >
 >  > John Couture