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Re: What efficiency?!

Tesla List wrote:
> 
> > > Subject: Re: What efficiency?!
> > Subject: Re: What efficiency?!
> > > Subject: Re: What efficiency?!
> 
> >From bert.hickman-at-aquila-dot-comSat Nov 23 20:05:06 1996
> Date: Sat, 23 Nov 1996 10:22:42 -0800
> From: Bert Hickman <bert.hickman-at-aquila-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Re: What efficiency?!
> 
> Tesla List wrote:
> >
> > > Subject: Re: What efficiency?!
> >
> > >From hullr-at-whitlock-dot-comFri Nov 22 08:49:51 1996
> > Date: Tue, 14 Mar 2000 20:48:21 -0800
> > From: Richard Hull <hullr-at-whitlock-dot-com>
> > To: tesla-at-pupman-dot-com
> > Subject: Re: What efficiency?!
> >
> > Tesla List wrote:
> > >
> > > >From MALCOLM-at-directorate.wnp.ac.nzThu Nov 21 14:40:56 1996
> > > Date: Fri, 22 Nov 1996 07:45:52 +1200
> > > From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
> > > To: tesla-at-pupman-dot-com
> > > Subject: Re: What efficiency?!
> > >
> > > On the topic of fibre-optic monitoring....
> > >
> > > > > Why not "simply" use a fiber-optic link between the scope and CT?  CT-unit
> > > > > would be floating.. This might include AD of the measurement data (and
> > > > > sending the data via fiber in digital form)  and then a datalogger
> > > > > (computer)  recording the data from the fiber.. One could then run
> > > > > fourier-analysis etc. to the data..
> > > > >
> > > > > One of those things on my "must try some time" list..
> > > > >
> > > > > Kristian Ukkonen.
> > > > >
> > > > > Kristian,
> > > >
> > > > The fiber optic link is the only way to go.  I would imagine the link
> > > > would not be an easy or casual thing either.  Their is still the emitter
> > > > circuitry right there at the coil!  Good luck with it.
> > > >
> > > > Richard Hull, TCBOR
> > >
> > > This might not directly relate to the problem being solved here but I
> > > recently had the idea of using two fibres to monitor my rotary gap
> > > position/speed and that was to use one to pipe light to the gap and
> > > the other as the pickup.
> > >
> > > Malcolm
> >
> > Malcolm,
> >
> > The use of the arcs own light is a great idea and occured to us about a
> > year and a half ago.  Glass fiber would be best, but with plastic fiber
> > and a good lens system little lose or attenuation would be present.  With
> > a very fast PIN diode detector, a lot of valuable data can be gathered
> > regarding what is actually taking place in the gap.  This is in addition
> > to the original info sought. (Dwell, quench and rep rate.)  Also, an
> > audio tape recorder can record the gap noise and later the exact rep rate
> > can be determined with either a counter or a scope.
> >
> > Richard Hull, TCBOR
> 
> Richard and Malcolm,
> 
> I was wondering how to easily measure dwell times when running - this
> should work for vacuum, rotary, or air blast gaps! Thanks for some great
> ideas!!
> 
> -- Bert --


Bert,

 Use the above info..  fiber optic light pipe to PIN diode, to scope.  
Light is only possible during spark on times, thus this is the dwell.  (I 
would use an IR filter to elimenate 100% of the IR and deep red 
wavelength.  This must be attenuated by about a factor of 10,000.

Richard Hull,TCBOR