Hi David,Regarding the MOT being more pig like than NST like - this is certain. The difference being the output voltage and core size (thus, saturation level). The MOT's inductances are similar to large transformer inductances, but their cores are small in comparison to what their inductances are capable of, thus, their great for short activity if run at their normal inputs. But time on is part of the MOT's "not so great areas". It's not a transformer that I would push for one of those 1/2 hour runs (well, I would push it anyway, but I'm not sure how hot or how long the transformer would deal with the heat).
The coupling is not surprising to me. It is a typical transformer coupling curve that I've seen before and the values are right in the mix of what we would expect. For myself, the surprise was the power related issues. The transformer is wired for high power, but the core size is small for the power it is capable of (so thermal losses will take their toll if not somehow reduced).
Take care, Bart David Dean wrote:
On Tuesday 30 December 2008 07:08:21 pm bartb wrote:Has anyone else made detailed open and short circuit current measurements of a MOT? I'm curious how my measurements compare?Hi Bart About ten years ago I did some tests with some MOTs.As far as I can remember, your tests are very much in line with the tests I made.I am surprised at the high K numbers though. I would assume lower coupling due to the shunts, etc. but at the time I was only looking at the saturation curve, open circuit voltage and short circuit current.I think resonant cap size is quite reasonable considering open circuit voltage/short circuit current. Shows that a MOT is more pig like than NST like.later deano _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla
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