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Re: Sold state IGBT disruptive coil spark gap idea

Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>

Hi John,


Gerry,

In contrast to much of what I say above, Dr. Resonance has obtained
his longest streamers using a looser coupling.  Looser than what
his coil can physically withstand without getting racing sparks.
Maybe the special glyptol coating he uses permits him to
tighten his coupling far beyond what most folks can achieve
without getting racing sparks.  Maybe this is what has permitted
him to see what others have failed to see.
He runs looser coupling so the glyptol (even if it allowed tighter coupling) is not the reason. 


  To determine what's
happening, it would be necessary to know the measured
coupling of the Dr.'s coils to compare with other folks' coils.
From what the good Dr. has mentioned, he's building loosly coupled coils, but they are also running closer to Cres by about 18% than the standard 1.6 x Cres, so his cap voltage is getting to potential sooner and bps is a little higher. 


It would also be necessary to use the same method for
measuring the k of the various coils, or at least a method that will
give the same results.  Some coupling measurement methods
give incorrect results, making the coupling appear tighter than
it actually is.  This is especially true at tighter couplings.
Coupling is one of the most accurate numbers we have these days. To "compare" coils and reduce the potential for inaccuracy due to various methods, put all the coils into Javatc and calculate it. Then, only dimensional inputs are necessary to be accurate for comparison. 

Take care,
Bart