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sonotube coil
I thought I would post the results of my latest coil firings and see
if anyone had any comments.
The specs are:
2 5000v 300ma transformers connected anti-parallel and driven with
140vac.
.095uF capacitance consisting of an mmc plus a .01uF Fair Radio cap.
sync-rotary gap.
11 turn primary of 3/8" copper tube with 3/8" spacing between turns.
12-3/4" x 48" sonotube wound full length with 20gauge magnet wire.
9-1/2" x 49" drain pipe toroid which is way too heavy.
With this setup last night, it was hitting 95" several times. The
toroid was breaking out in three or four places and hitting the ground
all around the coil. If it hadn't been for the extra breakouts, maybe
could have gotten even more length though probably not much. I did try
for more length but couldn't get it. I use an aluminum ladder to take
hits and had it closed up leaning against the house. Tried moving it
and using a length of copper water pipe which would have been a lot
more sparklength if it had hit. Maybe not enough surface area to
attract the sparks?
All comments welcome, even if you think I'm using way too much
capacitance for a Tesla coil :-)
Later,
Alan
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