This was just a quickie to demonstrate that one can get sparks with a hand cranking a Tesla coil.
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I used an antique telephone alternator and was able to demonstrate sparks about 1/4 inch when cranking out about 100V AC peak into an NST. Mains is about 375 V AC peak by comparison. I used only one rather than 4 segments of the static gap but otherwise my mini-TC was unchanged.

Above shows a tiny spark in series with a neon on top of my mini coil. My right hand is a blur of rotation and my left hand is holding the camera infrared remote (which the camera can see). The out of focus CRO is set for 50V per division ie just over 100 V peak in a rather odd shaped wave.
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Photo Date: May 5, 2007