Have two nst's for12kv 60ma total now. Longer streamers now. Too long sometimes they blow by the strike rail to the primary. Its 21" from bottom of topload to primary copper tubing. The strike rail sits 3.5" above primary. I tried putting my smaller 3"x15" toroid under the 4"x17" to raise but still hitting primary. A breakout rod point up helps a lot but every now and then it hits bottom. I'm considering doing the 6" secondary which would add another 15" in height above primary but until then Is there anything other than breakout points that would help. Would changing the diameters of the toroid help? Ie using different size pie pans with dryer duct. My thinking is if it was wider then the primary coil would not be right under.
My secondary windings start flush with the primary, if I raise it the coupling will become weaker meaning shorter streamers?
I've seen some coils on youtube and the streamers go down but outside the primary, wondering if my strike rail was removed would that stop it from attracting it to the primary?
John cooper
Sent from my Cricket smartphone
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