Original poster: FutureT@xxxxxxx
In a message dated 10/6/05 11:08:43 AM Eastern Daylight Time,
tesla@xxxxxxxxxx writes:
I just set up my "Devian" coil. This coil was
originally designed to be very small and powerful.
the problem is that i cant even power it up 15%
without the sparks racing across the secondaries
surface. I have 5 coats of poly on it already. I
also played with to toroid in some failed attempt to
fix the problem.
How can i get sparks to stop racing across the
surface?
Usually racing sparks are caused by over-coupling. Better
tuning can help too to get rid of racing sparks. But in your
case it's probably greatly overcoupled. If the racing sparks
begin only after a period of time, this can point to a spark
gap problem. You didn't give details of the coil so it's possible
that it's simply too small for the power level you have in mind.
Try raising the secondary coil (assuming it's a normal classic
TC and not a bipolar coil). Raise the secondary by about 3"
or so assuming the secondary is about 20" tall. See if that
helps. If it helps you can raise it more. Be sure to verify best
tune point on the primary. If the racing sparks disappear, then
you can lower the secondary until the racing sparks appear again.
Then raise it slightly so there are no racing sparks.
Make sure your spark gap is good, (good quenching).
John