Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx> Hi, I got the secondary pretty coated now :-) http://drsstc.com/~piranha/PIRANHA/PIRANHA-2/PIRANHA-total-01.JPG http://drsstc.com/~piranha/PIRANHA/PIRANHA-2/PIRANHA-total-02.JPG The EnviroTex stuff did a great job even though I did not "baby" it at all ;-)) Remember the dragons: http://drsstc.com/~piranha/PIRANHA/PIRANHA-2/Dragons.JPG If there is no breakout point, they corona glow off their wings real cool!! http://drsstc.com/~piranha/PIRANHA/PIRANHA-2/PIRANHA-DragonsGlowing.JPG Best digital picture I could take...I am not sure if the 8 inch balls are "too big" yet... I can pump a full 300kV into them and they don't even try to break out... But when they do, I am sure it will be "spectacular" +:D I sort of think 6 inch balls might be a better choice for similar ~1kW coils... I will start removing the shorting jumpers in the SISG sections next to pump up the power far greater ;-)))
Cheers,
Terry
The PIRANHA coil is finally going ;-))For primary tuning, I set up the signal generator to frequency sweep from 100kHz to 110kHz.http://drsstc.com/~piranha/PIRANHA/PIRANHA-2/Tuning.JPG This gave me a nice graph to show the primary frequency: http://drsstc.com/~piranha/PIRANHA/PIRANHA-2/tuning.gif One "nice cable position" gave me 102.5kHz with is close enough :-) http://drsstc.com/~piranha/PIRANHA/PIRANHA-2/PIRANHA-Const-012.JPGI then bolted it all together to finish it up (still need to poly coat the secondary coil):http://drsstc.com/~piranha/PIRANHA/PIRANHA-2/Complete-1.JPG http://drsstc.com/~piranha/PIRANHA/PIRANHA-2/Complete-2.JPG Here it is doing 25 inch arcs at 1/2 power: http://drsstc.com/~piranha/PIRANHA/PIRANHA-2/Firing.JPGI can't run full power indoors. I loose about 10% in spark length due to the hidden primary (lower coupling) but it wants to arc "too far" already :-DSo it turned out real good!! Cheers, Terry