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Re: Secondary Theory (Was Bipolar Coil)-Heretical view

Hi Dr. Resonance,

	Veeerrrryy interesting!!

	In my LTR work I use very few turns on my 20 turn secondary so I know all
about that autotransformer thing!  I doubt if the resistance of the
secondary has much to do with anything.  Today, we have the means to
optimize such things.   This is one of those configurations that has not
been explored...

	I would be interested in your thoughts about the advantages of three coil
or magnifier systems.  Perhaps they could use more attention from the tools
we have today.  Some have said that a conventional coil will do just as
good as any magnifier but...  

	Malcolm's recent ideas on space wound coils approaching 1/4 wave systems
is also another area that may become "hot"...

Cheers, 

	Terry



At 01:25 PM 5/22/99 -0500, you wrote:
>to: Terry, Malcolm, all
>
>With the limited time I had available to conduct additional experiments the
>coil design seems to evolve to using a very low resistance high Q for the
>first 1/5th of the coil, ie, 1/2 inch copper tubing for the first 10 turns
>of the lower part of the secondary coil, and then going up with a very large
>stranded wire to approx 1/2-2/3 total height, and then using a finer wire
>for the upper part of the secondary.  I came to this conclusion when working
>with some small magnifier type designs and always fighting the flashover
>problem with the tight coupling parameters required for the driver coil
>(first pri/sec coils).  A Professor and close friend of mine from Univ. of
>Wis. suggested the Sloan approach --- eliminated the problem altogether by
>making the first pri an auto-transformer with the first sec coil and using
>an extremely hi-Q lower portion to drive the upper portion which produces
>the potential multiplication for the driver coil.  This output is then fed
>via a large dia. copper feedline over to the magnifier or extra coil.  In
>our experiment we ended up with a 50 turn lower copper tubing driver feeding
>upward into a 300 turn #6 AWG upper portion.  Potential multiplication was
>excellent --- up to 400 kV to drive the magnifier portion and no flashover
>to worry about.  The trick to doing this and getting the high level of
>coupling required for a magnifier design is to use a very large dia
>coilform, ie, in our case, 60 inches in dia.  Then k stays very high as
>required for good energy transfer.   This large dia. driver requirement is
>why most small size magnifiers don't work very well because they require the
>primary to be wound up higher to hit the same k value and the result is lots
>of polyethylene to prevent flashover, and then, even with lots of
>insulation, there are still creeping sparks and corona that do not produce a
>stable longer term design.
>
>If you have a medium to large coil try this experiment.  Remove the sec coil
>and place it 8-10 feet away on a suitable insulating stand.  Now tap into
>the normal primary coil and feed this to the bottom of the sec coil.  It
>does require some retuning and is a bit more difficult as you now have two
>taps to more around, but the results are very interesting.  I would ask
>anyone on the list to try this with some of their coils -- you will be
>amazed at how well this works out.   You can eventually enclosed the pri
>with taps into a large box and just feed the output over to your elevated
>sec coil.
>
>Regards,
>
>Dr.Resonance
>
snip.........