I have a used microwave XFMR for sale. Make a Tesla coil or even rewind for a spot welder, etc. (Two separate windings.) I don't know, nor will I measure, the high voltage secondary winding. The oven rating was 1500 watts. $5 + actual, cheapest, shipping via US Postal Service. Shipping weight ~21 lbs from zip 64074. 73, Charlie, N0TT