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Re: first coil & help!!!
From: Raymond C. Howes[SMTP:rchowes-at-email.msn-dot-com]
Sent: Sunday, November 02, 1997 7:26 PM
To: Tesla List
Subject: first coil & help!!!
Hi my name is Ray,
I just built my first coil and fired it up and thought it was pretty
good,but.
Here's my spec's.
1st 1 15kv-at-30ma neon sign tran, 2 chokes one on each side of hv lines.
Conected to 6 spark gaps. Using 8 16 oz bottles as caps. Primary 3/16 solid
wire at .25 spacing.
wound 8 times. Secondary 4.5 at 20 inches #27 wire. wound at 1300
times.Torid 4" dia x12"wide. First time I fired it I got a great spark from
the center of the coil at least 12".
As I understand it should'nt come from the center of the coil. Through my
reading on Tesla info I figured it was overcoupled? I tried to raise the
secondary from the base with no result.When I opened the spark gap up I got
a really big streamer but at losing a bottle in the process. To high freq?
Unwound the coil to 1000 turns.Got very little spark again from the center.
Spark gap would not fire . disconnected ground from sec. and spark gap would
fire. Real small spark! I'm limited to availabilty of wire all I could get
was #27 enamel.
I had a spare transfomer and added it to all the mess. Now I'm at 15kv-at-60ma.
Seconday still the same. Little spark and still from the center of the
coil. Again it would only fire with the secondary ground disconnected. I'm
ready to start all over again with a new secondary. I'm not a scientist
just a hobbyist. Theres got to be an easy solution.
Any help would really be apreciated. If I left any thing out let me know
please.
thanks. Ray rchowes-at-msn-dot-com