yes it's not 40kv , the spark gap is 9mm which is around 27kv but if we increase the input voltage to a 2s battery this transformer can easily achieve 40kv , thanks for comment 😇
@@madScientist999mm is around 9kv. The three kilovolt per millimeter thing only works if your electrodes are perfect spheres, so you really only got 10kv if you are lucky.
