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Variac blowing fuses (another newbie question)



Original poster: otmaskin5@xxxxxxx Got a lot of great advice on this from you guys. Just wanted to let you know how it turnied out.

I added PFC/motor run caps only - & didn't do anything to lower tank capacitance at this point (that was Plan B). PFC seeed to take care of it. I've run the coil a good number of times for 30-45 second durations, even with a lot of continuous arcs to ground - and even though I only had a 15A replacement fuse in stead of the original 20A. I had no further blown fuses.

PFC alone may not be the ideal solution. And I may ultimately be better off lowering my .03uF tank capacitance as suggested by a number of you (I have a 15/60 NST). But at least I'm back in the ozone business for now.

As a side note, when my motor run caps arrived from Mouser, they looked identical to the picture of capacitors "not suitable for PFC use" shown on Gary Lau's website. I thought oh @#%, I got the wrong ones. But I checked again, they are shown as motor run caps on the Mouser shipping order. And Gary's picture shows the brand name Phillips, while the ones I goe are DCE. But they look identical in every other way. Anyway, I tried them & they seem to work OK.

Thanks everyone.  Dennis Hopkinton, MA

Now to go to work on those bleeder resistors...