On the same day I tested the 6" the first time I decided to hook the PSU up with 2 additional MOTs to get ~10-12KV. Also the power draw from the mains voltage connector increased to 15A. I think thats appropriately for inside runs, with a smaller ballast I could push this PSU to 25A for 1minute without blowing the 16A breaker, but are you crazy? - The sparks hit all metal objects in my workingroom, all objects were ~1m to 1,3m away from the topload. I wasnīt able to get full power (open the sparkgap a little more) because the sparks the sparks would usually hit the ceiling and the powerlines. I think itīs a quite good result for the first try. The ladder is 1,3m away from topload, so Iīve reached sparks of 2 times the lenght of the winding. I think it would also hit 1,5m with this configuration but I couldnīt move the ladder more away from the coil.
Also see the movie.
Here you see a very strong strike to my vise (that is not groundet at all).
And a picture of normal operation.
Iīve finally tried to fire the 6" secondary up, for that I used all the stuff from the 4" Teslacoil (including the toploads), the results were very disappointing. Powersupply was 4x MOT stack ballastet to ~10-12A drawn from 230V, so input Power is 2,7KW. Here you see the longest sparks I was able to achieve. The strike to the ladder is 1250mm away from the topload, thats 1,9 times the windinglenght ->Iīve anticipated at least 2 times the winding lenght, so 1300mm sparks.
Picture of normal operating, the streamers are 1000-1200mm long.
Notice the streamers on the right side.
Here you see a double strike to ground, but only visible on the left side. The right-side-spark stroke into a metalpiece of my workbench.
Here is a picture with 4 seconds exposure time -> The spark output is quite low and so it looks quite boring.