From: boris petkovic
Date: Tue, 15 Oct 2002 12:38:20 -0700 (PDT)
Subject: Re: [TSSP] Top Voltage
Terry, > > Terry wrote: > > Forgive if I am to blame for any of that. --- You are forgiven,althought I wasn't reffering to you;)As Paul said there was so much things on tssp list these days.Becouse of your efforts ,you and Paul have credit thick as elephant on my "account". Especially that OLTC thing,and 4 hours of coiling a day (!)..and series of most recent msm lately.My hat off Terry! Many active coilers will see the most beneficial thing in OLTC just novelity of its' construction,absence of gap ,no need of HV source for powering it etc,etc. But I assure you that members of this project know better: IT IS IN CONTROL OF MANY PARAMETERS,RUN IN LARGE VARIETY OF EXCITATION MODES,IN POSSIBILITY OF CONDUCTING FAR MORE EXTENSIVE MSMs..A FANTASTIC TOOL FOR RESEARCHING.AS SUCH,IT WILL ESTABLISH MORE FACTS THAT SHOULD BE LINKED TO CLASSICAL CONSTRUCTED TC. SIMPLY,IT WILL BRING ART OF COILING INTO NEW HIGHTS. Maybe you're not aware of that now.But future will show..You may say that the concept of OLTC isn't based completely of your ideas.But your name will be written as the name of first one who constructed it. ---- Paul wrote: > Boris, have you anything more on the conditions > under which the > empirical formula for the sphere's Emin was > obtained? --- Not much more I affraid.It is said it holds true in vicinity of spherical fields for smooth electrodes. DC and monoplolar impulsive voltages area. It's questionable what A factor is in Terry's case. I guess,It involves influence of 3 factors mixed togather:Temperature,Humidity,Pressure. --- > Are we on the right lines by taking 30kV/cm as the > threshold > for a uniform field only, and expecting the > non-uniform (sharp > drop-off away from the surface) to raise the > threshold quite a bit? --- Could be true in certain cases,but we must be careful judging about it.Only Terry's msms and observaion caunts here. --- > > I suppose that if the tinfoil ceiling was made > adjustable in height, > it could be brought down closer to the raised > sphere, so that the > breakout would approach tabulated sphere-plane > discharge conditions. --- Nice idea.I think it is worth of try.Terry can you make it adjustable?Alternative is to raise all OLTC towards ceiling.What is more comfortable? --- > > We could measure breakout volts against different > positions of the > 'ceilingplane' and compare those with calculated > field non-uniformity. > We hypothesise that the more uniform situations > (smaller sphere-plane > distance) will approach the 30kV/cm. > > The system of toroid, rod, sphere, and ceiling plane > lends itself > very well to field calculations. Everything is > smooth, no sharp > edges, so field calcs should be trustworthy. I'm > working up a > program to plot the fields. --- Now you're speaking.Let's hope to see better correlations soon. regards, Boris __________________________________________________ Do you Yahoo!? Faith Hill - Exclusive Performances, Videos & More http://faith.yahoo.com
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