Re: my friends coil

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Dr. Resonance by way of Terry Fritz <teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>


You may be off resonance with your tuning.

Try a "scrap wire" primary of 30 turns with a bare spot scraped off every
turn (stagger these).  Keep your variac at 30% until you can find the best
resonance point.

Then, using some scrap pieces of wood, experiment with the elevation of your
sec. coil above the primary until you find the sweet spot.  After these
procedures you can now bring your variac up to full power and you should
have a nice output.

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913
----- Original Message ----- >

 > My friend is having some trouble with his first coil.  It was a small
 > "Budget Coil" wound on a piece of pre cut 2 in. diameter
 > acrylic.  Unfortunately it could only be 12 inches tall and he used extra
 > 24 awg wire to make it.  It have between 500 and 600 turns, powered by a
 > 12/30 NST. Capacitor is a "Geek Group" MMC style cap rated -at- .015uf
20kvdc.
 > Spark gap was a simple static gap adjustable between 6mm and 25mm.
Primary
 > 7.5 turns, .25 in. copper tubing, .25 in. spacing, vertical.  Top load: 6
 > in. diameter sphere. I'm still working on my first coil, so I'm pretty
 > inexperienced.