From: FutureT@aol.com
Date: Tue, 21 May 2002 17:16:33 EDT
Subject: Re: [TSSP] Racing arcs (multiple ring idea)
--part1_177.8a08a3d.2a1c1331_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 5/21/02 5:43:34 AM Eastern Daylight Time, tesla123@pacbell.net writes: Bart, all, I wonder if it would have helped if the wire spiraled up to the toroid, instead of going straight up? In any case, your comment reminded me of something that occurred with my 36" spark tube coil. Generally, I ran the VTTC without any toroid at first as I was increasing the spark length during coil development. I found that when the spark output reached 29", it started emitting a 29" or so spark from the top turn, rather than from the breakout point which was positioned about 4" above the secondary. The secondary was about 6" or 7" dia. I placed a thin corona ring about 1/2" above the secondary, and this stopped the sparks from emitting from the top turn. The corona ring was formed from 1/8" copper tubing. When the coil was complete, I kept this corona ring in place, since it stopped any "side flaring", even when I obtained 40" sparks without any toroid. A toroid didn't increase the spark length on this tube coil. But a toroid does increase the spark length by about 1" on my 20" spark smaller tube coil. Cheers, John > I believe these sparks eminated from the wire which connects the toroid. The > wire is straight up vertically and is part of the secondary 24 awg wire. > Rather > than move the toroid down to add shielding, I configured a corona ring > between the top of the secondary and toroid. Corona ring dimensions ended > up at 4" x 14.875" and a nice fit. The top 1/3 of the corona ring was > actually inside the toroid and the corona ring bottom plane was 1.375" > above the top winding. > > --part1_177.8a08a3d.2a1c1331_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 5/21/02 5:43:34 AM Eastern Daylight Time, tesla123@pacbell.net writes:
Bart, all,
I wonder if it would have helped if the wire spiraled up to the toroid,
instead of going straight up?
In any case, your comment reminded
me of something that occurred with my 36" spark tube coil.
Generally, I ran the VTTC without any toroid at first as I was
increasing the spark length during coil development. I found
that when the spark output reached 29", it started emitting a
29" or so spark
from the top turn, rather than from the breakout point which was
positioned about 4" above the secondary. The secondary was
about 6" or 7" dia. I placed a thin corona ring about 1/2" above
the secondary, and this stopped the sparks from emitting from
the top turn. The corona ring was formed from 1/8" copper
tubing. When the coil was complete, I kept this corona
ring in place, since it stopped any "side flaring", even when I obtained
40" sparks without any toroid. A toroid didn't increase the
spark length on this tube coil. But a toroid does increase the
spark length by about 1" on my 20" spark smaller tube coil.
Cheers,
John
I believe these sparks eminated from the wire which connects the toroid. The wire is straight up vertically and is part of the secondary 24 awg wire. Rather
than move the toroid down to add shielding, I configured a corona ring between the top of the secondary and toroid. Corona ring dimensions ended up at 4" x 14.875" and a nice fit. The top 1/3 of the corona ring was actually inside the toroid and the corona ring bottom plane was 1.375" above the top winding.
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Maintainer Paul Nicholson, paul@abelian.demon.co.uk.