Re: primary INSIDE of secondary?

["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>


This does work.  Greg Leyh's very large coil used this design to produce
sparks in excess of 50 ft.

In most small coils the primary resides approx 2 1/2 to 3 inches below sec.
to obtain proper coupling so you could wind your pri. on the exterior of a
Glyptal coated PVC tube which would allow you to raise and lower the pri for
best coeff. of coupling.  Up in the base of the sec. approx 7 inches up
silicone a 1/4 thick acrylic disk in place to help prevent interior
flashovers.

Keep your spark gap set tight and the variac down to under 30% when doing
your primary tap tuning.  Then, later, replace the scrap wire primary with a
high quality well insulated wire and no taps the could arc over.

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913


    I asked
 > the operator where the primary was.  He said  that it was inside the
 > secondary.
 >