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Re: sparks running down secondary - why?
Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <A123X-at-aol-dot-com>
They are called racing sparks and are due to over coupling. Usually they
should be occuring less with a larger topload, unless the tuning ended up
better with a larger topload. Try raising your secondary relative to the
primary. Spark lengh may decrease but your secondary won't die.
In a message dated 5/28/01 4:15:17 PM Eastern Daylight Time, tesla-at-pupman-dot-com
> Original poster: "Bill Vanyo by way of Terry Fritz <twftesla-at-qwest-dot-net>" <
> Last time I ran my coil, I got occasional loud snappy sparks running
> down the length of the secondary, as well as occasional firing of my
> safety gap. Wondering what causes the sparks down the secondary, and if
> it's a problem?
> The only change I made since my previous run (which was still
> underperforming, but perhaps due to wind - not sure - this is my first
> coil) was to hook my NST power supply (three 15/60's, two with internal
> PFC) to a seperate 20 amp line. I could now run it without tripping the
> breaker. I still plan on hooking it to a 30 amp 240 volt line, stepped
> down by variac to 120 volt.
> Oh, and the other change is a bigger topload. Originally, I had a
> smaller toroid, and now have added a larger one on top. I can run with
> just the larger.
> Thanks again,
> Bill V.