Re: Vortex gap loss measurements

["Jim Lux" <jimlux-at-jpl.nasa.gov> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

You might also get a linear decrement if your gap is acting as a constant
voltage drop instead of a constant resistance.  A resistance would give a
log decrement, in the classic RLC circuit.

----------
> From: Tesla list <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: RE: Vortex gap loss measurements
> Date: Saturday, September 02, 2000 12:48 PM
> 
> Original poster: "John H. Couture" <couturejh-at-worldnet.att-dot-net> 
> 
> 
> Gary -
> 
> Many thanks for providing us with your test data. More of this type of
test
> information is needed because there are still many secrets of TC
operation
> we need to know.
> 
> You mentioned that at times the dampened wave appeared to be logarithmic.
I
> found this to be true in some of my tests using a standard scope.
However,
> the traces were very irregular. Could it be that the storage scope is
> affecting the results by sampling more than one trace?
> 
> John Couture
> 
> ---------------------------
> 
> ---Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Friday, September 01, 2000 6:17 PM
> To: tesla-at-pupman-dot-com
> Subject: Vortex gap loss measurements
> 
> 
> Original poster: "Lau, Gary" <Gary.Lau-at-compaq-dot-com>
> 
> Today I found some time and performed a comparison between the gap losses
of
> my single vacuum gap, and my new single vortex gap.  To do so, I scoped
the
> primary ringdown with no secondary in place.  I used a Terry Fritz fiber
> optic voltage probe across the primary coil and a digital storage scope
to
> record the results.  I have not yet accurately calibrated the voltage
> readout, so for now, the results are just relative to each other.
> 
> With no secondary in place, the ringdown is a linearly decrementing
> waveform, not logarithmic.  As such, the slope of the ringdown indicates
the
> losses in the circuit and is independent of the gap firing voltage.  I
> performed ringdown slope measurements at a variety of gap widths to vary
the
> initial voltage, but the ringdown slope is a constant, independent of
Vgap.
> 
> The power to the blower motor is varied through a lamp dimmer and I tried
> varying the motor speed to see what effect that had.  At very low speed,
the
> linearly decrementing waveform became slightly logarithmic-looking, but
> still predominantly linear.  The gap breakdown voltage appeared to change
> slightly at low speed, but this was hard to measure as it was slight and
the
> bang-to-bang gap breakdown voltage is not as consistent as one might
hope.
> 
> The slope decrement figures are assuming that my probe is accurately
> calibrated for voltage, though I suspect it may not be, so the figures
are
> useful only for relative comparison purposes.
> The pressurized vortex gap decremented at 200V/usec.
> The vacuum gap decremented at 235V/usec (17.5% faster).
> The vortex gap breakdown voltage is about 20% higher than the vacuum gap
at
> the same gap distance.
> 
> Vortex gap web page:
> 
> http://people.ne.mediaone-dot-net/lau/tesla/vortexgap.htm
> 
> <http://people.ne.mediaone-dot-net/lau/tesla/vortexgap.htm>
> Vacuum gap web page:
> 
> http://people.ne.mediaone-dot-net/lau/tesla/onegap.htm
> 
> <http://people.ne.mediaone-dot-net/lau/tesla/onegap.htm>
> 
> Regards, Gary Lau
> Waltham, MA USA
> 
> 
> 
> 
> 
>