Re: SSgap Update 4-1-2001

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

Original poster: "Kennan C Herrick by way of Terry Fritz <twftesla-at-uswest-dot-net>" <kcha1-at-juno-dot-com>

I see I mis-stated my observation as to Fr's.  I set up my
expanded/delayed sweep so that I could spread out 1 Fr cycle (about 140
KHz) over 6.2 cm of sweep.  For a cycle prior to spark break-out I
measured 6.2 cm.  For a cycle well after break-out I measured, as best I
could, 6.3 or 6.4 cm.  For the latter cycle there was ~ 1 cm of jitter,
spark-to-spark, so the measurement was approximate.  But I'm pretty sure
it was as stated as I had a spark-rate of only ~2/sec so could eyeball it
fairly well.  That's ~0.1 part out of 6.3 or so, or ~1.6% difference,
max.

My scope has a digital-delay sweep plug-in and so, after I finish some
minor modification work, I'll try to use that to substantially eliminate
the jitter.

Ref:  Gary Johnson's posting of today.

More later...

Ken Herrick

On Tue, 03 Apr 2001 20:06:06 -0600 "Tesla list" <tesla-at-pupman-dot-com>
writes:
> Original poster: "Kennan C Herrick by way of Terry Fritz 
> <twftesla-at-uswest-dot-net>" <kcha1-at-juno-dot-com>
> 
> I might if I had such a scope.  As it is, using expanded/delayed 
> sweep, I
> find the Fr's are within 15%--and, I suspect, a lot closer.  As good 
> as I
> can do, right now.
> 
> KCH
> 
> On Tue, 03 Apr 2001 14:06:44 -0600 "Tesla list" <tesla-at-pupman-dot-com>
> writes:
> > Original poster: "Peter Lawrence by way of Terry Fritz 
> > <twftesla-at-uswest-dot-net>" <Peter.Lawrence-at-Sun-dot-com>
> > 
> > Kennan,
> >         wow, cool. So can you track that freq with a digital 
> storage 
> > scope,
> > before and after spark breakout. If so, what do you observe?
> > 
> > -Peter Lawrence.
> > 
> > 
> > >
> > >Original poster: "Kennan C Herrick by way of Terry Fritz
> > <twftesla-at-uswest-dot-net>" 
> > <kcha1-at-juno-dot-com>
> > >
> > >Peter-
> > >
> > >Yes, that's what I do: the whole thing is a power oscillator with 
> 
> > the
> > >only frequency-determining element being the secondary.  It 
> always
> > >operates at the instantaneous Fr of the secondary.
> > >
> > >It's tough to closely track that frequency otherwise since a) 
> it's
> > >generally a pretty sharp resonance and b) it wanders depending on 
> 
> > nearby
> > >conductors.  But s.s. systems, I am finding, have to be pretty 
> > "beefy" to
> > >yield the quick & large flux-pulse necessary to shoot out really 
> 
> > long
> > >sparks.
> > >
> > >Ken Herrick
> > >
> > >On Mon, 02 Apr 2001 13:40:06 -0600 "Tesla list" 
> <tesla-at-pupman-dot-com>
> > >writes:
> > >> Original poster: "Peter Lawrence by way of Terry Fritz 
> > >> <twftesla-at-uswest-dot-net>" <Peter.Lawrence-at-Sun-dot-com>
> > >> 
> > >> Terry,
> > >>       (and anyone else working on SS-TC, Kennan?...) since the 
> 
> > >> resonant
> > >> frequence of a TC secondary seems to change w/ and w/o a 
> > streamer, 
> > >> have
> > >> you ever considered changing the driver frequence in real time 
> to 
> > 
> > >> match
> > >> the secondary.
> > >> 
> > >> -Peter Lawrence.
> > >> 
> > 
> > 
> > 
> > 
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> 
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