Tesla Coil Page
from High Voltage Press: At last, the combined edition!
by George TrinkausL
ost Inventions, Radio Tesla, Tesla Coil ...merged and amplified
quality paperback, 8.5 X 11, 128 pages, $18.50
240 illustrations __________________________
Joey and his Tesla coil.
a first-generation tesla coil (gen 1)
Upper level: 15-kv neon transformer with safety gap,
main spark gap, primary, secondary, and terminal capacity.
How to build
a Tesla coil on any scale: see Tesla
a second-generation tesla coil (gen 2)
left by Trinkaus, right by Heden.
Gen 2 coils. Note the large terminal capacitors, the larger width-to-length ratio of the secondary coils, and the flat primary (right).
a third-generation Tesla Coil
Gen-3 coil. Lower left: 5KV power supply, Inside
case: 3-amp variac, 5kv neon transformer (open core, monopolar), safety
gap, voltmeter, and on top, extending from the insulator, is a 30kv rectifier
left, with red coils and mica caps, is the brute-force line filter.
Center: high-voltage capacitor
bank. Barely visible to right is the spark gap. See details below. Right: gen-3 Tesla coil, oil-immersed in "Minihex"
aquarium set into galvanized tub. Attached at right is jack panel for connection to primary and
secondary windings. Shown in spark mode. For the electronic
mode, plug in the pulse generator shown below.
The spark gap is made from a set of automotive ignition points. I
asked the parts dealer for the largest set available. This gap has
endured years of trouble-free operation under low-power conditions.
nylon machine screw adjusts the gap.
A spark-plug series gap would be appropriate for higher powers. Left:
open series gap; right: airtight series gap. The open-gap's plastic is
polycarbonate; the airtight gap's is ultra-high-molecular weight (UHMW). Gasket is high-temp red silicone. Plugs are wired from base to top of next. The plugs must be non-resistor, a challenge these days. Try marine or tractor plugs.
gen-3 coil is based on
demonstrated in London in 1897.
This winding jig is set up for a gen-3 coil.