Re: MOTs/MMC

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Christoph Bohr by way of Terry Fritz <teslalist-at-qwest-dot-net>" <cb-at-luebke-lands.de>

I had similar thoughts when I started playing with MOTs. But just as adviced
by another coiler from the list secondary ballasting was more effective.
When I used primary ballsting ( shorted MOT ) the performance of the coil
was poor ( although it works well for the PSU itself ).
This is due to big losses in secondary voltage. Now I limit the secondary
with MO-caps and everything is much better. With higher voltage the
spark-gap operates much smoother.
What I saw too, was the secondary of a MOT with shorted primary in series
with the output. I will try this tomorrow as Im looking to limit the current
further with the least voltage loss possible, curious what that woul lead
to...
Another idea that came up was if it wouldn't be a better idea to have a 6
stack instead of my 4, with higher output voltage limiting will hopefully be
much easyer with your stack.

So good luck and happy coiling.

Christoph


 >
 > I have seen a few discussions lately about using capacitors in series with
 > the secondary of microwave oven transformers as ballast to limit the
 > current.  What is the advantage of this method over using primary
inductive
 > or capacitive ballast?  I realize that winding a primary ballast can be a
 > pain but doesn't two or three MOTs (with shorted secondaries) in parallel
 > work ok?  How about using motor run caps in series with the primary?  It
 > just seems that ballasting would be easier done on the low voltage
 > side.  Just curious.
 >
 > Ed Sonderman
 >
 >
 >
 >