Joe Mastroianni wrote:
What I'm noticing is that at below 1/2 voltage on the variac, the gap is happily firing, and things are calm and sparky. When I go to about 2/3 power, I start getting a sharp crackling from the area of the gap itself. Sometimes the safety gap on the SRSG fires, and sometimes it doesn't - but if I go even higher on the voltage, my Terry Filter safety gap goes off so I shut down. Sometimes, the none of the gaps fire and I get a quick arc in the vicinity of the outer turns of the primary.
I had a similar problem until I physically changed where the electrode disk was on the motor shaft. The Freau controller works great, but it does have a limited range of adjustment, and the electrode presentation has to be within the window provided by the controller.
It took a few attempts, but drawing some marking on the disc with a sharpie helped me to adjust it just enough to get it within that window.
Jon
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