Big Coil
My big coil is powered by a 15kV 60mA NST.
The specification are:
Transco 15kV 60mA NST
Input fusing and power factor correction
15 amp fast blow fuse
Corcom dual stage AC line filter
MOV AC over voltage protection
200uF 180 VAC Power Factor Correction caps
7 x 1800 volt 2500 amp MOVs on each leg
2nF capacitance to ground on each leg
5K ohm 50 watt isolation resistor on each leg
Safety gap to ground on each leg
28nF MMC
5 rows by 10 of 1600V 0.056uF poly pulse caps
10m ohm 1/2 watt resistor across each cap
19.7 turns of 1/4 inch copper tubing
Inner dia. 12 inches
Pitch 0.375 inches
Tap point 15.1 turns
132uH inductance
Spark Gap
120 BPS Rotary sync gap
1800 RPM 1/4HP modified Magnatek motor
Two stationary steel electrodes
Four moving brass electrodes
1/2 inch x 7 inch dia. LE phenolic rotor
Dual stage line filter and MOVs on motor AC input
Solid oak construction
Ferrite noise suppression
Coupling to primary 0.145
System frequency 82 kHz
10.25 inch dia x 30.0 winding length
1000 turns #24 enameled magnet wire
32 inch long by 10.25 dia PVC pipe.
75.4mH inductance
8 inch cord x 30 inch outer diameter dryer duct (used for all calculations and measurements).
6.5 inch cord x 23.25 inch dia aluminum toroid (Finn Hammer) is shown in photos.
