Re: Measuring Coupling Coefficients...Let it go! --> What

From: 	Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: 	Sunday, December 14, 1997 5:45 PM
To: 	Tesla List
Subject: 	Re: Measuring Coupling Coefficients...Let it go!  --> What 

Hello Terry, all,

> From:   terryf-at-verinet-dot-com[SMTP:terryf-at-verinet-dot-com]
> Sent:   Thursday, December 11, 1997 10:13 PM
> To:     Tesla List
> Subject:    Measuring Coupling Coefficients...Let it go!  --> What are the  ingredients for a long and "satisfying" spark output?????


>         Once we can predict the total system, the outputs will increase and
> the pitfalls will decrease dramatically.  There will be some old traditional
> beliefs that will get stepped on, but that's life.  The Tesla coil is an
> electronic device is not very complicated compared to many electronic
> systems that are well known.  What is different, is that they have not been
> studied to a high level because there is no big financial reason to do so.
> You won't get as rich by building the perfect Tesla coil as you would by
> building the perfect cellular telephone system.  It is hard to justify the
> equipment and time needed to do a really comprehensive study of these
> devices.  However, we live in wonderful times!  Cheap computers, excellent
> software, the Internet, commodity test equipment, playful engineers, etc.
> allow a level of study at the amateur level that is remarkable. I disagree
> that Tesla coils can only be understood at an empirical level.  We just need
> to try harder and we are.
>         I feel we need to let the "Measuring Coupling Coefficients" thread
> go..... and move on.  There are bigger fish to be fried!  My next question
> is much more fun anyway :-)
>         What are the ingredients for a long and "satisfying" spark
> output?????????????  
> Is it power, energy, current, voltage, frequency, duration, sound, length,
> tuning????  I have asked for information on this before and have come up
> with little information.  We can tune the output to any load but what "IS"
> the load.  Is it a resistor, network of elements, a time (voltage or
> current) varying "thing"?  Any thoughts or observations are welcome.  My
> fiber optic VI probe is actually coming together now and should provide some
> clues helpful for modeling but if anyone has any information regarding what
> the output load of a Tesla coil really looks like I would be very interested. 
> We can do anything, once we know what to do!
>         Terry Fritz
> (ranting, raving, and theorizing in the cold Colorado night)
> terryf-at-verinet-dot-com

Output is heavily dependent on power throughtput. Many experiments 
have shown this. In a series of low powered experiments I exchanged
output voltage for BPS while keeping power input constant and obtained
the same length over a wide range. Voltage per se and current per se 
should not be considered in isolation.
    The single thing that popped out of my coil survey was that 
wallplug power was a far cry from E x BPS - the power actually going 
into the coil. This is an excellent starting point to consider in 
gaining insight into how to improve outputs. Hint: where is the power 
lost?  Please do not ask for more information on this. Others are 
working on it as I write this.