Small tesla coil (1sq ft) findings

From:  Jeff Corr [SMTP:corr-at-enid-dot-com]
Sent:  Thursday, June 18, 1998 12:45 AM
To:  tesla list
Subject:  small tesla coil (1sq ft) findings

Hello all...   in order to have a tesla coil in my college
dorm room next year :-)  I had to construct a special one.

It is mounted on a 12"x12" plywood section, the secondary being only
12" tall.

The reason I post this here is I find it interesting this coil can produce
12" long sparks, the length of the coil itself.

Just thought that someone else might be interested in duplicating this
coil as it is small enough to carry anywhere, and still performs very

Here are the specs :

power  level - 9kv, 30ma 270VA

capactitor - .004uf , rated at around 12kv (physical dimensions 8" long, 3"
in diameter)

primary - helical, 10 turns of #20 solid copper, turns 1/8th inch apart.

secondary 1.5"x12", #32 copper enambled.

Spark gap, single gap, half an inch apart.

No safety gap, no chokes, just neon, primary, secondary, gap, and cap.

Jeff Corr
2114 Monitor
Enid, OK 73703