[TCML] First light new secondary
TeslaMiles at att.net
Wed Oct 20 17:46:42 MDT 2010
Great evening with my first coil in more than 30 years. If you recall I burned up my first secondary with a design flaw. I did good this time. No racing sparks, no strikes to the primary nor grounded strike rail. Looked great and obtained 3+ foot arcs in the air, not to a grounded point.
This was with the tuning point from JavaTC. I thought I would play with the tuning to see if I could improve the output. During that testing effort, changing the primary tap point a half turn at a time, everything just stopped. Even with everything disconnected I can't draw an arc on the NSTs. I have 4 x 12/30 on parallel for a total of 12/120. Could I have really killed 4 NSTs?
I have a Terry filter that I adjusted with just the NSTs connected an nothing else. Any clues?
It's late tonight, but I plan on testing each NST to see if just one is shorted and grounding the rest. The safety gap fired a few times but not enough to cause concern IMHO.
My setup is a 4.125" secondary with 25" of 23AWG for 975 turns. K of .125. 4 x 12/30mA for 120mA total. A blown RQSG with 30nF tank. Total gap is .21.
Clues? Suggestions? Comments?
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