Small Coil
My small coil is powered by a 9kV 30mA NST.
The specification are:
ACTown 9kV 30mA NST
Input fusing and power factor correction
2.5 amp fast blow fuse
Corcom dual stage AC line filter
MOV AC over voltage protection
60uF 180 VAC Power Factor Correction caps
4 x 1800 volt 2500 amp MOVs on each leg
360pF capacitance to ground on each leg
5K ohm 25 watt isolation resistor on each leg
Safety gap to ground on each leg
24nF MMC
3 rows by 7 of 1600V 0.056uF poly pulse caps
10m ohm 1/2 watt resistor across each cap
13 turns of 1/4 inch copper tubing
Inner dia. 6.8 inches
Pitch 0.5 inches
Tap point 7.75 turns
18.75uH inductance
Four ferrite noise suppression cores
1800 RPM 1/4HP modified A.O Smith motor
Two stationary brass electrodes
Four moving brass electrodes
1/4 inch x 7 inch dia. G-10 rotor
Dual stage line filter and MOVs on motor AC input
Lexan base with all copper/brass current path
Coupling to primary 0.117
Primary level with first secondary winding
System frequency 240 kHz
Secondary coil
4.25 inch dia x 26.125 winding length
1180 turns #24 enameled magnet wire
27 inch long by 4.25 dia PVC pipe.
22.1mH inductance
Top Terminal
4 inch cord x 13 inch dia aluminum toroid (John Freau)
