A search for a better primary

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Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi All,

I just finished part 3 of this exercise that makes an in depth 
comparison between an "existing" primary located 1 inch below the 
bottom turn of the secondary that has a 1 inch space from the 8 inch 
coil form and a "new" primary design that is located 1 inch above the 
bottom secondary turn but with a 3.5 inch clearance from the same 
coil form.  The existing primary has demonstrated a tendency for 
racing arcs that prompted this search.

Part 2 showed a simulation method that not only seems to predict the 
high stress levels needed for racing arcs, but also predicts where 
they would breakout.  The prediction agrees with observation.  The 
simulation, as shown in part 3, also shows what happens when the TC 
is out of tune.

In part 3, it is shown that even though the new primary has a greater 
overall coupling,  it also has less stress on the coil reducing the 
tendency for racing arcs, and also shows greater tolerance for 
mistuning.  If this approach works out, this may be a way to avoid 
racing arcs and yet get higher coupling and higher topload 
voltage.  This may also be a way to improve the energy rise time at 
the top load and facilitate better streamer formation.  The following 
are the links to the most recent of each of 3 parts.  Please read the 
papers and comment.

<http://hot-streamer.com/temp/GerryReynolds/In_Search_for_a_Better_Primary1.pdf>http://hot-streamer.com/temp/GerryReynolds/In_Search_for_a_Better_Primary1.pdf

http://hot-streamer.com/temp/GerryReynolds/A_Search_for_a_Better_Primary2.pdf

<http://hot-streamer.com/temp/GerryReynolds/A_Search_for_a_Better_Primary3.pdf>http://hot-streamer.com/temp/GerryReynolds/A_Search_for_a_Better_Primary3.pdf

Gerry R.