Re: [TCML] Spark gap

[Mddeming@xxxxxxx]

In a message dated 2/24/08 12:00:00 A.M. Eastern Standard Time,  
bartb@xxxxxxxxxxxxxxxx writes:

>  Spark length is all about using the biggest bang possible.  And it  
guarantees that each bang is identically and maximally  sized.
>   
Is it? Why? Sorry about that Gary, not trying  to be a butt-head, however 
when statements without why is made, I have to  ask why or what backs up 
those statements. I know where you are coming  from. I'm questioning much 
these days so I may seem an arrogant ass, but  I'm really just trying to 
get some info to back up statements.

Best  regards,
Bart
> Regards, Gary lau
> MA,  USA



Hi Gary, Bart, All,
 
I think I need to wade in here with a few observations. The functioning of  
any gap, especially a static gap,  is not just chaotic, but Chaotic in the  
fractal sense- "critically dependent upon initial conditions."
1) Each time the gap fires, its thermal state is slightly different.  (air 
temperature, humidity, microscopic air currents, thermal electrode  temperature, 
conduction, convection and radiation, oxidation state of the exact  point on 
the surface where the arc forms. This guarantees than the breakdown  
conditions will not be identical bang to bang. 
2) Each time a charging cycle begins, there is a slightly different  residual 
charge on the cap than the previous time so the charging is slightly  
faster/slower than the previous time, thus the discharge voltage for each arc  
initiation would be slightly different in both magnitude and  timing.
3) The thermal, atmospheric, and electrical conditions in and around the  
secondary are in a state of dynamic flux. Otherwise, each streamer would occur  
at exactly the same place, with the same shape and power. As the voltage builds 
 and streamers grow, the secondary is in a continuously varying, though 
cyclical  state. These differences in the state of the secondary reflect back to 
the  primary as a different set on initial conditions for the next bang. 
4) Repeated measurements taken on a series of 10 or 15 second runs,  when 
compared to measurements taken on a 20 or 30 minute continuous run, will  show a 
significant difference in spread of the "bell-curves" of the  repeated 
measures, as the differences become more pronounced. 
 
These hundreds of microscopic differences add up, often in bizarre ways and  
don't always cancel each other out.( cf: "Rogue waves", "butterfly effect",  
"Cantor dust", etc.). No matter how hard we try, there will always be some  
residual "dust" of variation so that we are always talking about average  
behaviors.
 
'Taint simple, ;^))
 
Matt D.
 
Looking at the output with the spectrum analyzer of a good service  monitor  



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