Leydencake! A new
experimental Pancake Coil,
Oil-Filled in a Glass Container
This time an unusual test. You know the glass candle containers
that are sold everywhere? Home Goods, Kohl's, Target...
I got this one at a thrift store for $1.99. Because I don't want
to drill the glass, I've come up with a new solution to grounding the
Place aluminum foil on the inside of the glass like a leyden jar (only
not a complete circle), and connect the outermost wire of the
Next, make a concentric foil for the outside of the jar, and ground the
outer foil to the innermost turn of the primary! Its like putting
a .001 mfd cap
in series with earth for a Tesla Coil secondary.
Low power seems ok...
Turning up the power...
Oops. Add some wax there...
Now its looking better...
Coil is around 7.5" OD. ID 1.25". Wound with 34
AWG wire and .001" paper interleaves 2" wide.
Discharge exceeds 11".
Approx actual size.
Coil is insulated in paraffin oil (bottom) and paraffin wax
(above). Tests were done with .032 - .112 mfd
Jeff Behary, 2010